English verb conjugation
CAN STOP

Regular verb: stop - stopped - stopped

Affirmation

Simple form	V-ing form
I can stop you can stop he can stop we can stop you can stop they can stop	I can be stopping you can be stopping he can be stopping we can be stopping you can be stopping they can be stopping
Perfect	V-ing perfect
I can have stopped you can have stopped he can have stopped we can have stopped you can have stopped they can have stopped	I can have been stopping you can have been stopping he can have been stopping we can have been stopping you can have been stopping they can have been stopping

Negation

Simple form	V-ing form
I cannot stop you cannot stop he cannot stop we cannot stop you cannot stop they cannot stop	I cannot be stopping you cannot be stopping he cannot be stopping we cannot be stopping you cannot be stopping they cannot be stopping
Perfect	V-ing perfect
I cannot have stopped you cannot have stopped he cannot have stopped we cannot have stopped you cannot have stopped they cannot have stopped	I cannot have been stopping you cannot have been stopping he cannot have been stopping we cannot have been stopping you cannot have been stopping they cannot have been stopping

Interrogative form

Simple form	V-ing form
can I stop? can you stop? can he stop? can we stop? can you stop? can they stop?	can I be stopping? can you be stopping? can he be stopping? can we be stopping? can you be stopping? can they be stopping?
Perfect	V-ing perfect
can I have stopped? can you have stopped? can he have stopped? can we have stopped? can you have stopped? can they have stopped?	can I have been stopping? can you have been stopping? can he have been stopping? can we have been stopping? can you have been stopping? can they have been stopping?

Interro-negative form

Simple form	V-ing form
can I not stop? can you not stop? can he not stop? can we not stop? can you not stop? can they not stop?	can I not be stopping? can you not be stopping? can he not be stopping? can we not be stopping? can you not be stopping? can they not be stopping?
Perfect	V-ing perfect
can I not have stopped? can you not have stopped? can he not have stopped? can we not have stopped? can you not have stopped? can they not have stopped?	can I not have been stopping? can you not have been stopping? can he not have been stopping? can we not have been stopping? can you not have been stopping? can they not have been stopping?