English verb conjugation
COULD QUOIN

Regular verb: quoin - quoined - quoined

Affirmation

Simple form	V-ing form
I could quoin you could quoin she could quoin we could quoin you could quoin they could quoin	I could be quoining you could be quoining she could be quoining we could be quoining you could be quoining they could be quoining
Perfect	V-ing perfect
I could have quoined you could have quoined she could have quoined we could have quoined you could have quoined they could have quoined	I could have been quoining you could have been quoining she could have been quoining we could have been quoining you could have been quoining they could have been quoining

Negation

Simple form	V-ing form
I couldn't quoin you couldn't quoin she couldn't quoin we couldn't quoin you couldn't quoin they couldn't quoin	I couldn't be quoining you couldn't be quoining she couldn't be quoining we couldn't be quoining you couldn't be quoining they couldn't be quoining
Perfect	V-ing perfect
I couldn't have quoined you couldn't have quoined she couldn't have quoined we couldn't have quoined you couldn't have quoined they couldn't have quoined	I couldn't have been quoining you couldn't have been quoining she couldn't have been quoining we couldn't have been quoining you couldn't have been quoining they couldn't have been quoining

Interrogative form

Simple form	V-ing form
could I quoin? could you quoin? could she quoin? could we quoin? could you quoin? could they quoin?	could I be quoining? could you be quoining? could she be quoining? could we be quoining? could you be quoining? could they be quoining?
Perfect	V-ing perfect
could I have quoined? could you have quoined? could she have quoined? could we have quoined? could you have quoined? could they have quoined?	could I have been quoining? could you have been quoining? could she have been quoining? could we have been quoining? could you have been quoining? could they have been quoining?

Interro-negative form

Simple form	V-ing form
couldn't I quoin? couldn't you quoin? couldn't she quoin? couldn't we quoin? couldn't you quoin? couldn't they quoin?	couldn't I be quoining? couldn't you be quoining? couldn't she be quoining? couldn't we be quoining? couldn't you be quoining? couldn't they be quoining?
Perfect	V-ing perfect
couldn't I have quoined? couldn't you have quoined? couldn't she have quoined? couldn't we have quoined? couldn't you have quoined? couldn't they have quoined?	couldn't I have been quoining? couldn't you have been quoining? couldn't she have been quoining? couldn't we have been quoining? couldn't you have been quoining? couldn't they have been quoining?