English verb conjugation
COULD SUBJOIN

Regular verb: subjoin - subjoined - subjoined

Affirmation

Simple form	V-ing form
I could subjoin you could subjoin she could subjoin we could subjoin you could subjoin they could subjoin	I could be subjoining you could be subjoining she could be subjoining we could be subjoining you could be subjoining they could be subjoining
Perfect	V-ing perfect
I could have subjoined you could have subjoined she could have subjoined we could have subjoined you could have subjoined they could have subjoined	I could have been subjoining you could have been subjoining she could have been subjoining we could have been subjoining you could have been subjoining they could have been subjoining

Negation

Simple form	V-ing form
I couldn't subjoin you couldn't subjoin she couldn't subjoin we couldn't subjoin you couldn't subjoin they couldn't subjoin	I couldn't be subjoining you couldn't be subjoining she couldn't be subjoining we couldn't be subjoining you couldn't be subjoining they couldn't be subjoining
Perfect	V-ing perfect
I couldn't have subjoined you couldn't have subjoined she couldn't have subjoined we couldn't have subjoined you couldn't have subjoined they couldn't have subjoined	I couldn't have been subjoining you couldn't have been subjoining she couldn't have been subjoining we couldn't have been subjoining you couldn't have been subjoining they couldn't have been subjoining

Interrogative form

Simple form	V-ing form
could I subjoin? could you subjoin? could she subjoin? could we subjoin? could you subjoin? could they subjoin?	could I be subjoining? could you be subjoining? could she be subjoining? could we be subjoining? could you be subjoining? could they be subjoining?
Perfect	V-ing perfect
could I have subjoined? could you have subjoined? could she have subjoined? could we have subjoined? could you have subjoined? could they have subjoined?	could I have been subjoining? could you have been subjoining? could she have been subjoining? could we have been subjoining? could you have been subjoining? could they have been subjoining?

Interro-negative form

Simple form	V-ing form
couldn't I subjoin? couldn't you subjoin? couldn't she subjoin? couldn't we subjoin? couldn't you subjoin? couldn't they subjoin?	couldn't I be subjoining? couldn't you be subjoining? couldn't she be subjoining? couldn't we be subjoining? couldn't you be subjoining? couldn't they be subjoining?
Perfect	V-ing perfect
couldn't I have subjoined? couldn't you have subjoined? couldn't she have subjoined? couldn't we have subjoined? couldn't you have subjoined? couldn't they have subjoined?	couldn't I have been subjoining? couldn't you have been subjoining? couldn't she have been subjoining? couldn't we have been subjoining? couldn't you have been subjoining? couldn't they have been subjoining?