I can propose you can propose she can propose we can propose you can propose they can propose
V-ing form
I can be proposing you can be proposing she can be proposing we can be proposing you can be proposing they can be proposing
Perfect
I can have proposed you can have proposed she can have proposed we can have proposed you can have proposed they can have proposed
V-ing perfect
I can have been proposing you can have been proposing she can have been proposing we can have been proposing you can have been proposing they can have been proposing
Negation
Simple form
I can't propose you can't propose she can't propose we can't propose you can't propose they can't propose
V-ing form
I can't be proposing you can't be proposing she can't be proposing we can't be proposing you can't be proposing they can't be proposing
Perfect
I can't have proposed you can't have proposed she can't have proposed we can't have proposed you can't have proposed they can't have proposed
V-ing perfect
I can't have been proposing you can't have been proposing she can't have been proposing we can't have been proposing you can't have been proposing they can't have been proposing
Interrogative form
Simple form
can I propose? can you propose? can she propose? can we propose? can you propose? can they propose?
V-ing form
can I be proposing? can you be proposing? can she be proposing? can we be proposing? can you be proposing? can they be proposing?
Perfect
can I have proposed? can you have proposed? can she have proposed? can we have proposed? can you have proposed? can they have proposed?
V-ing perfect
can I have been proposing? can you have been proposing? can she have been proposing? can we have been proposing? can you have been proposing? can they have been proposing?
Interro-negative form
Simple form
can't I propose? can't you propose? can't she propose? can't we propose? can't you propose? can't they propose?
V-ing form
can't I be proposing? can't you be proposing? can't she be proposing? can't we be proposing? can't you be proposing? can't they be proposing?
Perfect
can't I have proposed? can't you have proposed? can't she have proposed? can't we have proposed? can't you have proposed? can't they have proposed?
V-ing perfect
can't I have been proposing? can't you have been proposing? can't she have been proposing? can't we have been proposing? can't you have been proposing? can't they have been proposing?