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 cannot propose you cannot propose she cannot propose we cannot propose you cannot propose they cannot propose
V-ing form
I cannot be proposing you cannot be proposing she cannot be proposing we cannot be proposing you cannot be proposing they cannot be proposing
Perfect
I cannot have proposed you cannot have proposed she cannot have proposed we cannot have proposed you cannot have proposed they cannot have proposed
V-ing perfect
I cannot have been proposing you cannot have been proposing she cannot have been proposing we cannot have been proposing you cannot have been proposing they cannot 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 I not propose? can you not propose? can she not propose? can we not propose? can you not propose? can they not propose?
V-ing form
can I not be proposing? can you not be proposing? can she not be proposing? can we not be proposing? can you not be proposing? can they not be proposing?
Perfect
can I not have proposed? can you not have proposed? can she not have proposed? can we not have proposed? can you not have proposed? can they not have proposed?
V-ing perfect
can I not have been proposing? can you not have been proposing? can she not have been proposing? can we not have been proposing? can you not have been proposing? can they not have been proposing?