English verb conjugation
CAN AGREE

Regular verb: agree - agreed - agreed

Affirmation

Simple form	V-ing form
I can agree you can agree she can agree we can agree you can agree they can agree	I can be agreeing you can be agreeing she can be agreeing we can be agreeing you can be agreeing they can be agreeing
Perfect	V-ing perfect
I can have agreed you can have agreed she can have agreed we can have agreed you can have agreed they can have agreed	I can have been agreeing you can have been agreeing she can have been agreeing we can have been agreeing you can have been agreeing they can have been agreeing

Negation

Simple form	V-ing form
I cannot agree you cannot agree she cannot agree we cannot agree you cannot agree they cannot agree	I cannot be agreeing you cannot be agreeing she cannot be agreeing we cannot be agreeing you cannot be agreeing they cannot be agreeing
Perfect	V-ing perfect
I cannot have agreed you cannot have agreed she cannot have agreed we cannot have agreed you cannot have agreed they cannot have agreed	I cannot have been agreeing you cannot have been agreeing she cannot have been agreeing we cannot have been agreeing you cannot have been agreeing they cannot have been agreeing

Interrogative form

Simple form	V-ing form
can I agree? can you agree? can she agree? can we agree? can you agree? can they agree?	can I be agreeing? can you be agreeing? can she be agreeing? can we be agreeing? can you be agreeing? can they be agreeing?
Perfect	V-ing perfect
can I have agreed? can you have agreed? can she have agreed? can we have agreed? can you have agreed? can they have agreed?	can I have been agreeing? can you have been agreeing? can she have been agreeing? can we have been agreeing? can you have been agreeing? can they have been agreeing?

Interro-negative form

Simple form	V-ing form
can I not agree? can you not agree? can she not agree? can we not agree? can you not agree? can they not agree?	can I not be agreeing? can you not be agreeing? can she not be agreeing? can we not be agreeing? can you not be agreeing? can they not be agreeing?
Perfect	V-ing perfect
can I not have agreed? can you not have agreed? can she not have agreed? can we not have agreed? can you not have agreed? can they not have agreed?	can I not have been agreeing? can you not have been agreeing? can she not have been agreeing? can we not have been agreeing? can you not have been agreeing? can they not have been agreeing?