I can circle you can circle she can circle we can circle you can circle they can circle
V-ing form
I can be circling you can be circling she can be circling we can be circling you can be circling they can be circling
Perfect
I can have circled you can have circled she can have circled we can have circled you can have circled they can have circled
V-ing perfect
I can have been circling you can have been circling she can have been circling we can have been circling you can have been circling they can have been circling
Negation
Simple form
I cannot circle you cannot circle she cannot circle we cannot circle you cannot circle they cannot circle
V-ing form
I cannot be circling you cannot be circling she cannot be circling we cannot be circling you cannot be circling they cannot be circling
Perfect
I cannot have circled you cannot have circled she cannot have circled we cannot have circled you cannot have circled they cannot have circled
V-ing perfect
I cannot have been circling you cannot have been circling she cannot have been circling we cannot have been circling you cannot have been circling they cannot have been circling
Interrogative form
Simple form
can I circle? can you circle? can she circle? can we circle? can you circle? can they circle?
V-ing form
can I be circling? can you be circling? can she be circling? can we be circling? can you be circling? can they be circling?
Perfect
can I have circled? can you have circled? can she have circled? can we have circled? can you have circled? can they have circled?
V-ing perfect
can I have been circling? can you have been circling? can she have been circling? can we have been circling? can you have been circling? can they have been circling?
Interro-negative form
Simple form
can I not circle? can you not circle? can she not circle? can we not circle? can you not circle? can they not circle?
V-ing form
can I not be circling? can you not be circling? can she not be circling? can we not be circling? can you not be circling? can they not be circling?
Perfect
can I not have circled? can you not have circled? can she not have circled? can we not have circled? can you not have circled? can they not have circled?
V-ing perfect
can I not have been circling? can you not have been circling? can she not have been circling? can we not have been circling? can you not have been circling? can they not have been circling?