English verb conjugation
CAN SLIP

Regular verb: slip - slipped - slipped

Affirmation

Simple form	V-ing form
I can slip you can slip he can slip we can slip you can slip they can slip	I can be slipping you can be slipping he can be slipping we can be slipping you can be slipping they can be slipping
Perfect	V-ing perfect
I can have slipped you can have slipped he can have slipped we can have slipped you can have slipped they can have slipped	I can have been slipping you can have been slipping he can have been slipping we can have been slipping you can have been slipping they can have been slipping

Negation

Simple form	V-ing form
I cannot slip you cannot slip he cannot slip we cannot slip you cannot slip they cannot slip	I cannot be slipping you cannot be slipping he cannot be slipping we cannot be slipping you cannot be slipping they cannot be slipping
Perfect	V-ing perfect
I cannot have slipped you cannot have slipped he cannot have slipped we cannot have slipped you cannot have slipped they cannot have slipped	I cannot have been slipping you cannot have been slipping he cannot have been slipping we cannot have been slipping you cannot have been slipping they cannot have been slipping

Interrogative form

Simple form	V-ing form
can I slip? can you slip? can he slip? can we slip? can you slip? can they slip?	can I be slipping? can you be slipping? can he be slipping? can we be slipping? can you be slipping? can they be slipping?
Perfect	V-ing perfect
can I have slipped? can you have slipped? can he have slipped? can we have slipped? can you have slipped? can they have slipped?	can I have been slipping? can you have been slipping? can he have been slipping? can we have been slipping? can you have been slipping? can they have been slipping?

Interro-negative form

Simple form	V-ing form
can I not slip? can you not slip? can he not slip? can we not slip? can you not slip? can they not slip?	can I not be slipping? can you not be slipping? can he not be slipping? can we not be slipping? can you not be slipping? can they not be slipping?
Perfect	V-ing perfect
can I not have slipped? can you not have slipped? can he not have slipped? can we not have slipped? can you not have slipped? can they not have slipped?	can I not have been slipping? can you not have been slipping? can he not have been slipping? can we not have been slipping? can you not have been slipping? can they not have been slipping?