Use of 3rd person present tense when combined with “not only”





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I'm confused why the use of "increases" in the following sentence is incorrect --- I intuitively think it should be "increase" instead, but can't quite explain why I think so.




High consumption of trans fat is dangerous: not only does it increases
your LDL cholesterol level, it also decreases your HDL cholesterol.




My confusion is exacerbated by the fact that "high consumption of trans fat is dangerous: it increases your LDL cholesterol level" seems grammatically correct, and the use of "decreases" in the sentence above also seems correct.










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  • Yep, it's a tupo.
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    It s/b increase. Notice the word "does" in your sentence. 'It increases' vs. 'It does increase.' Do does so much. dictionary.cambridge.org/us/grammar/british-grammar/…
    – KannE
    yesterday










  • Please cite the source.
    – Kris
    18 hours ago






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    @Kris --- are you referring to the source of the sentence I'm asking about? (If so, a friend sent it to me in an email).
    – Vincent Tjeng
    10 hours ago










  • Vincent, don't forget that if you think my answer suitably resolves your question, you can formally accept it :-)
    – Chappo
    3 hours ago

















up vote
2
down vote

favorite












I'm confused why the use of "increases" in the following sentence is incorrect --- I intuitively think it should be "increase" instead, but can't quite explain why I think so.




High consumption of trans fat is dangerous: not only does it increases
your LDL cholesterol level, it also decreases your HDL cholesterol.




My confusion is exacerbated by the fact that "high consumption of trans fat is dangerous: it increases your LDL cholesterol level" seems grammatically correct, and the use of "decreases" in the sentence above also seems correct.










share|improve this question







New contributor




Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • Yep, it's a tupo.
    – Hot Licks
    yesterday






  • 1




    It s/b increase. Notice the word "does" in your sentence. 'It increases' vs. 'It does increase.' Do does so much. dictionary.cambridge.org/us/grammar/british-grammar/…
    – KannE
    yesterday










  • Please cite the source.
    – Kris
    18 hours ago






  • 1




    @Kris --- are you referring to the source of the sentence I'm asking about? (If so, a friend sent it to me in an email).
    – Vincent Tjeng
    10 hours ago










  • Vincent, don't forget that if you think my answer suitably resolves your question, you can formally accept it :-)
    – Chappo
    3 hours ago













up vote
2
down vote

favorite









up vote
2
down vote

favorite











I'm confused why the use of "increases" in the following sentence is incorrect --- I intuitively think it should be "increase" instead, but can't quite explain why I think so.




High consumption of trans fat is dangerous: not only does it increases
your LDL cholesterol level, it also decreases your HDL cholesterol.




My confusion is exacerbated by the fact that "high consumption of trans fat is dangerous: it increases your LDL cholesterol level" seems grammatically correct, and the use of "decreases" in the sentence above also seems correct.










share|improve this question







New contributor




Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I'm confused why the use of "increases" in the following sentence is incorrect --- I intuitively think it should be "increase" instead, but can't quite explain why I think so.




High consumption of trans fat is dangerous: not only does it increases
your LDL cholesterol level, it also decreases your HDL cholesterol.




My confusion is exacerbated by the fact that "high consumption of trans fat is dangerous: it increases your LDL cholesterol level" seems grammatically correct, and the use of "decreases" in the sentence above also seems correct.







grammaticality






share|improve this question







New contributor




Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question






New contributor




Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked yesterday









Vincent Tjeng

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New contributor




Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Vincent Tjeng is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • Yep, it's a tupo.
    – Hot Licks
    yesterday






  • 1




    It s/b increase. Notice the word "does" in your sentence. 'It increases' vs. 'It does increase.' Do does so much. dictionary.cambridge.org/us/grammar/british-grammar/…
    – KannE
    yesterday










  • Please cite the source.
    – Kris
    18 hours ago






  • 1




    @Kris --- are you referring to the source of the sentence I'm asking about? (If so, a friend sent it to me in an email).
    – Vincent Tjeng
    10 hours ago










  • Vincent, don't forget that if you think my answer suitably resolves your question, you can formally accept it :-)
    – Chappo
    3 hours ago


















  • Yep, it's a tupo.
    – Hot Licks
    yesterday






  • 1




    It s/b increase. Notice the word "does" in your sentence. 'It increases' vs. 'It does increase.' Do does so much. dictionary.cambridge.org/us/grammar/british-grammar/…
    – KannE
    yesterday










  • Please cite the source.
    – Kris
    18 hours ago






  • 1




    @Kris --- are you referring to the source of the sentence I'm asking about? (If so, a friend sent it to me in an email).
    – Vincent Tjeng
    10 hours ago










  • Vincent, don't forget that if you think my answer suitably resolves your question, you can formally accept it :-)
    – Chappo
    3 hours ago
















Yep, it's a tupo.
– Hot Licks
yesterday




Yep, it's a tupo.
– Hot Licks
yesterday




1




1




It s/b increase. Notice the word "does" in your sentence. 'It increases' vs. 'It does increase.' Do does so much. dictionary.cambridge.org/us/grammar/british-grammar/…
– KannE
yesterday




It s/b increase. Notice the word "does" in your sentence. 'It increases' vs. 'It does increase.' Do does so much. dictionary.cambridge.org/us/grammar/british-grammar/…
– KannE
yesterday












Please cite the source.
– Kris
18 hours ago




Please cite the source.
– Kris
18 hours ago




1




1




@Kris --- are you referring to the source of the sentence I'm asking about? (If so, a friend sent it to me in an email).
– Vincent Tjeng
10 hours ago




@Kris --- are you referring to the source of the sentence I'm asking about? (If so, a friend sent it to me in an email).
– Vincent Tjeng
10 hours ago












Vincent, don't forget that if you think my answer suitably resolves your question, you can formally accept it :-)
– Chappo
3 hours ago




Vincent, don't forget that if you think my answer suitably resolves your question, you can formally accept it :-)
– Chappo
3 hours ago










1 Answer
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2
down vote













You're quite right that it should be increase.



It's a basic rule of grammar that the verb should agree in number with its subject, which is why we use "is" (subject is singular noun phrase "high consumption of trans fat") and "decreases" (subject is "it") in the sentence.



However, the construction "not only does it increase your LDL cholesterol" is a bit deceptive, because the use of "not only" in a declarative sentence requires an inverted word order. The verb here is does, which as an auxiliary combines with the bare infinitive (in this case, "increase"). The subject is the singular "it", which because of the inversion comes after the auxiliary verb. The format is therefore:




Not only [auxillary verb] [subject] [bare infinitive] [object]...




Hence:




Not only [does] [it] [increase] [your LDL cholesterol level]...







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    1 Answer
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    1 Answer
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    active

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    active

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    up vote
    2
    down vote













    You're quite right that it should be increase.



    It's a basic rule of grammar that the verb should agree in number with its subject, which is why we use "is" (subject is singular noun phrase "high consumption of trans fat") and "decreases" (subject is "it") in the sentence.



    However, the construction "not only does it increase your LDL cholesterol" is a bit deceptive, because the use of "not only" in a declarative sentence requires an inverted word order. The verb here is does, which as an auxiliary combines with the bare infinitive (in this case, "increase"). The subject is the singular "it", which because of the inversion comes after the auxiliary verb. The format is therefore:




    Not only [auxillary verb] [subject] [bare infinitive] [object]...




    Hence:




    Not only [does] [it] [increase] [your LDL cholesterol level]...







    share|improve this answer

























      up vote
      2
      down vote













      You're quite right that it should be increase.



      It's a basic rule of grammar that the verb should agree in number with its subject, which is why we use "is" (subject is singular noun phrase "high consumption of trans fat") and "decreases" (subject is "it") in the sentence.



      However, the construction "not only does it increase your LDL cholesterol" is a bit deceptive, because the use of "not only" in a declarative sentence requires an inverted word order. The verb here is does, which as an auxiliary combines with the bare infinitive (in this case, "increase"). The subject is the singular "it", which because of the inversion comes after the auxiliary verb. The format is therefore:




      Not only [auxillary verb] [subject] [bare infinitive] [object]...




      Hence:




      Not only [does] [it] [increase] [your LDL cholesterol level]...







      share|improve this answer























        up vote
        2
        down vote










        up vote
        2
        down vote









        You're quite right that it should be increase.



        It's a basic rule of grammar that the verb should agree in number with its subject, which is why we use "is" (subject is singular noun phrase "high consumption of trans fat") and "decreases" (subject is "it") in the sentence.



        However, the construction "not only does it increase your LDL cholesterol" is a bit deceptive, because the use of "not only" in a declarative sentence requires an inverted word order. The verb here is does, which as an auxiliary combines with the bare infinitive (in this case, "increase"). The subject is the singular "it", which because of the inversion comes after the auxiliary verb. The format is therefore:




        Not only [auxillary verb] [subject] [bare infinitive] [object]...




        Hence:




        Not only [does] [it] [increase] [your LDL cholesterol level]...







        share|improve this answer












        You're quite right that it should be increase.



        It's a basic rule of grammar that the verb should agree in number with its subject, which is why we use "is" (subject is singular noun phrase "high consumption of trans fat") and "decreases" (subject is "it") in the sentence.



        However, the construction "not only does it increase your LDL cholesterol" is a bit deceptive, because the use of "not only" in a declarative sentence requires an inverted word order. The verb here is does, which as an auxiliary combines with the bare infinitive (in this case, "increase"). The subject is the singular "it", which because of the inversion comes after the auxiliary verb. The format is therefore:




        Not only [auxillary verb] [subject] [bare infinitive] [object]...




        Hence:




        Not only [does] [it] [increase] [your LDL cholesterol level]...








        share|improve this answer












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        answered yesterday









        Chappo

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