English verb conjugation
COULD INTERJOIN

Regular verb: interjoin - interjoined - interjoined

Affirmation

Simple form	V-ing form
I could interjoin you could interjoin she could interjoin we could interjoin you could interjoin they could interjoin	I could be interjoining you could be interjoining she could be interjoining we could be interjoining you could be interjoining they could be interjoining
Perfect	V-ing perfect
I could have interjoined you could have interjoined she could have interjoined we could have interjoined you could have interjoined they could have interjoined	I could have been interjoining you could have been interjoining she could have been interjoining we could have been interjoining you could have been interjoining they could have been interjoining

Negation

Simple form	V-ing form
I couldn't interjoin you couldn't interjoin she couldn't interjoin we couldn't interjoin you couldn't interjoin they couldn't interjoin	I couldn't be interjoining you couldn't be interjoining she couldn't be interjoining we couldn't be interjoining you couldn't be interjoining they couldn't be interjoining
Perfect	V-ing perfect
I couldn't have interjoined you couldn't have interjoined she couldn't have interjoined we couldn't have interjoined you couldn't have interjoined they couldn't have interjoined	I couldn't have been interjoining you couldn't have been interjoining she couldn't have been interjoining we couldn't have been interjoining you couldn't have been interjoining they couldn't have been interjoining

Interrogative form

Simple form	V-ing form
could I interjoin? could you interjoin? could she interjoin? could we interjoin? could you interjoin? could they interjoin?	could I be interjoining? could you be interjoining? could she be interjoining? could we be interjoining? could you be interjoining? could they be interjoining?
Perfect	V-ing perfect
could I have interjoined? could you have interjoined? could she have interjoined? could we have interjoined? could you have interjoined? could they have interjoined?	could I have been interjoining? could you have been interjoining? could she have been interjoining? could we have been interjoining? could you have been interjoining? could they have been interjoining?

Interro-negative form

Simple form	V-ing form
couldn't I interjoin? couldn't you interjoin? couldn't she interjoin? couldn't we interjoin? couldn't you interjoin? couldn't they interjoin?	couldn't I be interjoining? couldn't you be interjoining? couldn't she be interjoining? couldn't we be interjoining? couldn't you be interjoining? couldn't they be interjoining?
Perfect	V-ing perfect
couldn't I have interjoined? couldn't you have interjoined? couldn't she have interjoined? couldn't we have interjoined? couldn't you have interjoined? couldn't they have interjoined?	couldn't I have been interjoining? couldn't you have been interjoining? couldn't she have been interjoining? couldn't we have been interjoining? couldn't you have been interjoining? couldn't they have been interjoining?