could propose
Regular verb: propose - proposed- proposed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could propose
you could propose
he could propose
we could propose
you could propose
they could propose 	I could be proposing
you could be proposing
he could be proposing
we could be proposing
you could be proposing
they could be proposing	I could have proposed
you could have proposed
he 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
he 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 	Perfect 	V-ing perfect 	
I could not propose
you could not propose
he could not propose
we could not propose
you could not propose
they could not propose 	I could not be proposing
you could not be proposing
he could not be proposing
we could not be proposing
you could not be proposing
they could not be proposing	I could not have proposed
you could not have proposed
he could not have proposed
we could not have proposed
you could not have proposed
they could not have proposed	I could not have been proposing
you could not have been proposing
he could not have been proposing
we could not have been proposing
you could not have been proposing
they could not have been proposing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I propose?
could you propose?
could he propose?
could we propose?
could you propose?
could they propose? 	could I be proposing?
could you be proposing?
could he be proposing?
could we be proposing?
could you be proposing?
could they be proposing? 	could I have proposed?
could you have proposed?
could he 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 he 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 	Perfect 	V-ing perfect 	
could I not propose?
could you not propose?
could he not propose?
could we not propose?
could you not propose?
could they not propose? 	could I not be proposing?
could you not be proposing?
could he not be proposing?
could we not be proposing?
could you not be proposing?
could they not be proposing? 	could I not have proposed?
could you not have proposed?
could he not have proposed?
could we not have proposed?
could you not have proposed?
could they not have proposed? 	could I not have been proposing?
could you not have been proposing?
could he not have been proposing?
could we not have been proposing?
could you not have been proposing?
could they not have been proposing?