English verb conjugation
COULD CONJOIN

Regular verb: conjoin - conjoined - conjoined

Affirmation

Simple form	V-ing form
I could conjoin you could conjoin he could conjoin we could conjoin you could conjoin they could conjoin	I could be conjoining you could be conjoining he could be conjoining we could be conjoining you could be conjoining they could be conjoining
Perfect	V-ing perfect
I could have conjoined you could have conjoined he could have conjoined we could have conjoined you could have conjoined they could have conjoined	I could have been conjoining you could have been conjoining he could have been conjoining we could have been conjoining you could have been conjoining they could have been conjoining

Negation

Simple form	V-ing form
I couldn't conjoin you couldn't conjoin he couldn't conjoin we couldn't conjoin you couldn't conjoin they couldn't conjoin	I couldn't be conjoining you couldn't be conjoining he couldn't be conjoining we couldn't be conjoining you couldn't be conjoining they couldn't be conjoining
Perfect	V-ing perfect
I couldn't have conjoined you couldn't have conjoined he couldn't have conjoined we couldn't have conjoined you couldn't have conjoined they couldn't have conjoined	I couldn't have been conjoining you couldn't have been conjoining he couldn't have been conjoining we couldn't have been conjoining you couldn't have been conjoining they couldn't have been conjoining

Interrogative form

Simple form	V-ing form
could I conjoin? could you conjoin? could he conjoin? could we conjoin? could you conjoin? could they conjoin?	could I be conjoining? could you be conjoining? could he be conjoining? could we be conjoining? could you be conjoining? could they be conjoining?
Perfect	V-ing perfect
could I have conjoined? could you have conjoined? could he have conjoined? could we have conjoined? could you have conjoined? could they have conjoined?	could I have been conjoining? could you have been conjoining? could he have been conjoining? could we have been conjoining? could you have been conjoining? could they have been conjoining?

Interro-negative form

Simple form	V-ing form
couldn't I conjoin? couldn't you conjoin? couldn't he conjoin? couldn't we conjoin? couldn't you conjoin? couldn't they conjoin?	couldn't I be conjoining? couldn't you be conjoining? couldn't he be conjoining? couldn't we be conjoining? couldn't you be conjoining? couldn't they be conjoining?
Perfect	V-ing perfect
couldn't I have conjoined? couldn't you have conjoined? couldn't he have conjoined? couldn't we have conjoined? couldn't you have conjoined? couldn't they have conjoined?	couldn't I have been conjoining? couldn't you have been conjoining? couldn't he have been conjoining? couldn't we have been conjoining? couldn't you have been conjoining? couldn't they have been conjoining?