English verb conjugation
COULD TROUBLE

Regular verb: trouble - troubled - troubled

Affirmation

Simple form	V-ing form
I could trouble you could trouble he could trouble we could trouble you could trouble they could trouble	I could be troubling you could be troubling he could be troubling we could be troubling you could be troubling they could be troubling
Perfect	V-ing perfect
I could have troubled you could have troubled he could have troubled we could have troubled you could have troubled they could have troubled	I could have been troubling you could have been troubling he could have been troubling we could have been troubling you could have been troubling they could have been troubling

Negation

Simple form	V-ing form
I could not trouble you could not trouble he could not trouble we could not trouble you could not trouble they could not trouble	I could not be troubling you could not be troubling he could not be troubling we could not be troubling you could not be troubling they could not be troubling
Perfect	V-ing perfect
I could not have troubled you could not have troubled he could not have troubled we could not have troubled you could not have troubled they could not have troubled	I could not have been troubling you could not have been troubling he could not have been troubling we could not have been troubling you could not have been troubling they could not have been troubling

Interrogative form

Simple form	V-ing form
could I trouble? could you trouble? could he trouble? could we trouble? could you trouble? could they trouble?	could I be troubling? could you be troubling? could he be troubling? could we be troubling? could you be troubling? could they be troubling?
Perfect	V-ing perfect
could I have troubled? could you have troubled? could he have troubled? could we have troubled? could you have troubled? could they have troubled?	could I have been troubling? could you have been troubling? could he have been troubling? could we have been troubling? could you have been troubling? could they have been troubling?

Interro-negative form

Simple form	V-ing form
could I not trouble? could you not trouble? could he not trouble? could we not trouble? could you not trouble? could they not trouble?	could I not be troubling? could you not be troubling? could he not be troubling? could we not be troubling? could you not be troubling? could they not be troubling?
Perfect	V-ing perfect
could I not have troubled? could you not have troubled? could he not have troubled? could we not have troubled? could you not have troubled? could they not have troubled?	could I not have been troubling? could you not have been troubling? could he not have been troubling? could we not have been troubling? could you not have been troubling? could they not have been troubling?