- • When an auxiliary verb (including modals) is used, the main verb is not inflected (no s or ed ending), meaning that either the base form or past participle is used.
- • The verb to be uses a different negation pattern.
|Tense||Negative Element + Contracted Forms||Examples|
does+not = doesn’t
do not play.|
She doesn’t play.
|Past Simple||did+not = didn’t||I didn’t play.|
+ not (*no amn’t)
is+not = isn’t
are+not = aren't
|I am not playing.|
- He is not playing.
- We aren’t playing.
In informal writing settings, you can contract the auxiliary verb with either the sentence subject or the word not. In formal writing settings, refrain from contracting any words.
- She is not playing. [formal]
- She isn’t playing. = She’s not playing. [informal]