I can gabble you can gabble he can gabble we can gabble you can gabble they can gabble
V-ing form
I can be gabbling you can be gabbling he can be gabbling we can be gabbling you can be gabbling they can be gabbling
Perfect
I can have gabbled you can have gabbled he can have gabbled we can have gabbled you can have gabbled they can have gabbled
V-ing perfect
I can have been gabbling you can have been gabbling he can have been gabbling we can have been gabbling you can have been gabbling they can have been gabbling
Negation
Simple form
I cannot gabble you cannot gabble he cannot gabble we cannot gabble you cannot gabble they cannot gabble
V-ing form
I cannot be gabbling you cannot be gabbling he cannot be gabbling we cannot be gabbling you cannot be gabbling they cannot be gabbling
Perfect
I cannot have gabbled you cannot have gabbled he cannot have gabbled we cannot have gabbled you cannot have gabbled they cannot have gabbled
V-ing perfect
I cannot have been gabbling you cannot have been gabbling he cannot have been gabbling we cannot have been gabbling you cannot have been gabbling they cannot have been gabbling
Interrogative form
Simple form
can I gabble? can you gabble? can he gabble? can we gabble? can you gabble? can they gabble?
V-ing form
can I be gabbling? can you be gabbling? can he be gabbling? can we be gabbling? can you be gabbling? can they be gabbling?
Perfect
can I have gabbled? can you have gabbled? can he have gabbled? can we have gabbled? can you have gabbled? can they have gabbled?
V-ing perfect
can I have been gabbling? can you have been gabbling? can he have been gabbling? can we have been gabbling? can you have been gabbling? can they have been gabbling?
Interro-negative form
Simple form
can I not gabble? can you not gabble? can he not gabble? can we not gabble? can you not gabble? can they not gabble?
V-ing form
can I not be gabbling? can you not be gabbling? can he not be gabbling? can we not be gabbling? can you not be gabbling? can they not be gabbling?
Perfect
can I not have gabbled? can you not have gabbled? can he not have gabbled? can we not have gabbled? can you not have gabbled? can they not have gabbled?
V-ing perfect
can I not have been gabbling? can you not have been gabbling? can he not have been gabbling? can we not have been gabbling? can you not have been gabbling? can they not have been gabbling?