English verb conjugation
COULD PROPOSE

Regular verb: propose - proposed - proposed

Affirmation

Simple form	V-ing form
I could propose you could propose she could propose we could propose you could propose they could propose	I could be proposing you could be proposing she could be proposing we could be proposing you could be proposing they could be proposing
Perfect	V-ing perfect
I could have proposed you could have proposed she could have proposed we could have proposed you could have proposed they could have proposed	I could have been proposing you could have been proposing she could have been proposing we could have been proposing you could have been proposing they could have been proposing

Negation

Simple form	V-ing form
I couldn't propose you couldn't propose she couldn't propose we couldn't propose you couldn't propose they couldn't propose	I couldn't be proposing you couldn't be proposing she couldn't be proposing we couldn't be proposing you couldn't be proposing they couldn't be proposing
Perfect	V-ing perfect
I couldn't have proposed you couldn't have proposed she couldn't have proposed we couldn't have proposed you couldn't have proposed they couldn't have proposed	I couldn't have been proposing you couldn't have been proposing she couldn't have been proposing we couldn't have been proposing you couldn't have been proposing they couldn't have been proposing

Interrogative form

Simple form	V-ing form
could I propose? could you propose? could she propose? could we propose? could you propose? could they propose?	could I be proposing? could you be proposing? could she be proposing? could we be proposing? could you be proposing? could they be proposing?
Perfect	V-ing perfect
could I have proposed? could you have proposed? could she have proposed? could we have proposed? could you have proposed? could they have proposed?	could I have been proposing? could you have been proposing? could she have been proposing? could we have been proposing? could you have been proposing? could they have been proposing?

Interro-negative form

Simple form	V-ing form
couldn't I propose? couldn't you propose? couldn't she propose? couldn't we propose? couldn't you propose? couldn't they propose?	couldn't I be proposing? couldn't you be proposing? couldn't she be proposing? couldn't we be proposing? couldn't you be proposing? couldn't they be proposing?
Perfect	V-ing perfect
couldn't I have proposed? couldn't you have proposed? couldn't she have proposed? couldn't we have proposed? couldn't you have proposed? couldn't they have proposed?	couldn't I have been proposing? couldn't you have been proposing? couldn't she have been proposing? couldn't we have been proposing? couldn't you have been proposing? couldn't they have been proposing?