English verb conjugation
COULD UNDERACT

Regular verb: underact - underacted - underacted

Affirmation

Simple form	V-ing form
I could underact you could underact he could underact we could underact you could underact they could underact	I could be underacting you could be underacting he could be underacting we could be underacting you could be underacting they could be underacting
Perfect	V-ing perfect
I could have underacted you could have underacted he could have underacted we could have underacted you could have underacted they could have underacted	I could have been underacting you could have been underacting he could have been underacting we could have been underacting you could have been underacting they could have been underacting

Negation

Simple form	V-ing form
I could not underact you could not underact he could not underact we could not underact you could not underact they could not underact	I could not be underacting you could not be underacting he could not be underacting we could not be underacting you could not be underacting they could not be underacting
Perfect	V-ing perfect
I could not have underacted you could not have underacted he could not have underacted we could not have underacted you could not have underacted they could not have underacted	I could not have been underacting you could not have been underacting he could not have been underacting we could not have been underacting you could not have been underacting they could not have been underacting

Interrogative form

Simple form	V-ing form
could I underact? could you underact? could he underact? could we underact? could you underact? could they underact?	could I be underacting? could you be underacting? could he be underacting? could we be underacting? could you be underacting? could they be underacting?
Perfect	V-ing perfect
could I have underacted? could you have underacted? could he have underacted? could we have underacted? could you have underacted? could they have underacted?	could I have been underacting? could you have been underacting? could he have been underacting? could we have been underacting? could you have been underacting? could they have been underacting?

Interro-negative form

Simple form	V-ing form
could I not underact? could you not underact? could he not underact? could we not underact? could you not underact? could they not underact?	could I not be underacting? could you not be underacting? could he not be underacting? could we not be underacting? could you not be underacting? could they not be underacting?
Perfect	V-ing perfect
could I not have underacted? could you not have underacted? could he not have underacted? could we not have underacted? could you not have underacted? could they not have underacted?	could I not have been underacting? could you not have been underacting? could he not have been underacting? could we not have been underacting? could you not have been underacting? could they not have been underacting?