I can babble you can babble she can babble we can babble you can babble they can babble
V-ing form
I can be babbling you can be babbling she can be babbling we can be babbling you can be babbling they can be babbling
Perfect
I can have babbled you can have babbled she can have babbled we can have babbled you can have babbled they can have babbled
V-ing perfect
I can have been babbling you can have been babbling she can have been babbling we can have been babbling you can have been babbling they can have been babbling
Negation
Simple form
I cannot babble you cannot babble she cannot babble we cannot babble you cannot babble they cannot babble
V-ing form
I cannot be babbling you cannot be babbling she cannot be babbling we cannot be babbling you cannot be babbling they cannot be babbling
Perfect
I cannot have babbled you cannot have babbled she cannot have babbled we cannot have babbled you cannot have babbled they cannot have babbled
V-ing perfect
I cannot have been babbling you cannot have been babbling she cannot have been babbling we cannot have been babbling you cannot have been babbling they cannot have been babbling
Interrogative form
Simple form
can I babble? can you babble? can she babble? can we babble? can you babble? can they babble?
V-ing form
can I be babbling? can you be babbling? can she be babbling? can we be babbling? can you be babbling? can they be babbling?
Perfect
can I have babbled? can you have babbled? can she have babbled? can we have babbled? can you have babbled? can they have babbled?
V-ing perfect
can I have been babbling? can you have been babbling? can she have been babbling? can we have been babbling? can you have been babbling? can they have been babbling?
Interro-negative form
Simple form
can I not babble? can you not babble? can she not babble? can we not babble? can you not babble? can they not babble?
V-ing form
can I not be babbling? can you not be babbling? can she not be babbling? can we not be babbling? can you not be babbling? can they not be babbling?
Perfect
can I not have babbled? can you not have babbled? can she not have babbled? can we not have babbled? can you not have babbled? can they not have babbled?
V-ing perfect
can I not have been babbling? can you not have been babbling? can she not have been babbling? can we not have been babbling? can you not have been babbling? can they not have been babbling?