English verb conjugation
CAN STOOL

Regular verb: stool - stooled - stooled

Affirmation

Simple form	V-ing form
I can stool you can stool he can stool we can stool you can stool they can stool	I can be stooling you can be stooling he can be stooling we can be stooling you can be stooling they can be stooling
Perfect	V-ing perfect
I can have stooled you can have stooled he can have stooled we can have stooled you can have stooled they can have stooled	I can have been stooling you can have been stooling he can have been stooling we can have been stooling you can have been stooling they can have been stooling

Negation

Simple form	V-ing form
I cannot stool you cannot stool he cannot stool we cannot stool you cannot stool they cannot stool	I cannot be stooling you cannot be stooling he cannot be stooling we cannot be stooling you cannot be stooling they cannot be stooling
Perfect	V-ing perfect
I cannot have stooled you cannot have stooled he cannot have stooled we cannot have stooled you cannot have stooled they cannot have stooled	I cannot have been stooling you cannot have been stooling he cannot have been stooling we cannot have been stooling you cannot have been stooling they cannot have been stooling

Interrogative form

Simple form	V-ing form
can I stool? can you stool? can he stool? can we stool? can you stool? can they stool?	can I be stooling? can you be stooling? can he be stooling? can we be stooling? can you be stooling? can they be stooling?
Perfect	V-ing perfect
can I have stooled? can you have stooled? can he have stooled? can we have stooled? can you have stooled? can they have stooled?	can I have been stooling? can you have been stooling? can he have been stooling? can we have been stooling? can you have been stooling? can they have been stooling?

Interro-negative form

Simple form	V-ing form
can I not stool? can you not stool? can he not stool? can we not stool? can you not stool? can they not stool?	can I not be stooling? can you not be stooling? can he not be stooling? can we not be stooling? can you not be stooling? can they not be stooling?
Perfect	V-ing perfect
can I not have stooled? can you not have stooled? can he not have stooled? can we not have stooled? can you not have stooled? can they not have stooled?	can I not have been stooling? can you not have been stooling? can he not have been stooling? can we not have been stooling? can you not have been stooling? can they not have been stooling?