I can drool you can drool he can drool we can drool you can drool they can drool
V-ing form
I can be drooling you can be drooling he can be drooling we can be drooling you can be drooling they can be drooling
Perfect
I can have drooled you can have drooled he can have drooled we can have drooled you can have drooled they can have drooled
V-ing perfect
I can have been drooling you can have been drooling he can have been drooling we can have been drooling you can have been drooling they can have been drooling
Negation
Simple form
I cannot drool you cannot drool he cannot drool we cannot drool you cannot drool they cannot drool
V-ing form
I cannot be drooling you cannot be drooling he cannot be drooling we cannot be drooling you cannot be drooling they cannot be drooling
Perfect
I cannot have drooled you cannot have drooled he cannot have drooled we cannot have drooled you cannot have drooled they cannot have drooled
V-ing perfect
I cannot have been drooling you cannot have been drooling he cannot have been drooling we cannot have been drooling you cannot have been drooling they cannot have been drooling
Interrogative form
Simple form
can I drool? can you drool? can he drool? can we drool? can you drool? can they drool?
V-ing form
can I be drooling? can you be drooling? can he be drooling? can we be drooling? can you be drooling? can they be drooling?
Perfect
can I have drooled? can you have drooled? can he have drooled? can we have drooled? can you have drooled? can they have drooled?
V-ing perfect
can I have been drooling? can you have been drooling? can he have been drooling? can we have been drooling? can you have been drooling? can they have been drooling?
Interro-negative form
Simple form
can I not drool? can you not drool? can he not drool? can we not drool? can you not drool? can they not drool?
V-ing form
can I not be drooling? can you not be drooling? can he not be drooling? can we not be drooling? can you not be drooling? can they not be drooling?
Perfect
can I not have drooled? can you not have drooled? can he not have drooled? can we not have drooled? can you not have drooled? can they not have drooled?
V-ing perfect
can I not have been drooling? can you not have been drooling? can he not have been drooling? can we not have been drooling? can you not have been drooling? can they not have been drooling?