Monday, October 24, 2016

auxiliary verbs - When to use "am not" and "do not" in a sentence



"I don't know what I'd do without you"



"I'm not know what I'd do without you"



Are these sentences correct?


What are the rules to use "not" in a sentence?


To what is not pointing in the above sentences?



Answer



When you are negating with not, look at the finite verb in the clause, the one that carries person and tense.




  • If it is an auxiliary verb (the first verb in a verbal construction) or a form of be, you may simply add not:




    He is here. ... The verb is a form of be. >>> He is not here.
    He has arrived. ... The verb has is an auxiliary. >>> He has not arrived.
    He must have arrived. ... The verb must is an auxiliary. >>> He must not have arrived.





  • Otherwise, you require DO-support:



    He came today. ... The verb came is not an auxiliary. >>> He did not come today.

    He arrived today. ... The verb arrived is not an auxiliary. >>> He did not arrive today.
    He has a car. ... Here has is not an auxiliary but a lexical verb meaning 'possesses'. >>> He does not have a car.





Until the twentieth century it was common to negate lexical HAVE without DO-support, but this is disappearing. Even earlier any verb might be negated without DO-support, but that died out by the nineteenth century.


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