English verb conjugation
CAN TILLER

Regular verb: tiller - tillered - tillered

Affirmation

Simple form	V-ing form
I can tiller you can tiller he can tiller we can tiller you can tiller they can tiller	I can be tillering you can be tillering he can be tillering we can be tillering you can be tillering they can be tillering
Perfect	V-ing perfect
I can have tillered you can have tillered he can have tillered we can have tillered you can have tillered they can have tillered	I can have been tillering you can have been tillering he can have been tillering we can have been tillering you can have been tillering they can have been tillering

Negation

Simple form	V-ing form
I cannot tiller you cannot tiller he cannot tiller we cannot tiller you cannot tiller they cannot tiller	I cannot be tillering you cannot be tillering he cannot be tillering we cannot be tillering you cannot be tillering they cannot be tillering
Perfect	V-ing perfect
I cannot have tillered you cannot have tillered he cannot have tillered we cannot have tillered you cannot have tillered they cannot have tillered	I cannot have been tillering you cannot have been tillering he cannot have been tillering we cannot have been tillering you cannot have been tillering they cannot have been tillering

Interrogative form

Simple form	V-ing form
can I tiller? can you tiller? can he tiller? can we tiller? can you tiller? can they tiller?	can I be tillering? can you be tillering? can he be tillering? can we be tillering? can you be tillering? can they be tillering?
Perfect	V-ing perfect
can I have tillered? can you have tillered? can he have tillered? can we have tillered? can you have tillered? can they have tillered?	can I have been tillering? can you have been tillering? can he have been tillering? can we have been tillering? can you have been tillering? can they have been tillering?

Interro-negative form

Simple form	V-ing form
can I not tiller? can you not tiller? can he not tiller? can we not tiller? can you not tiller? can they not tiller?	can I not be tillering? can you not be tillering? can he not be tillering? can we not be tillering? can you not be tillering? can they not be tillering?
Perfect	V-ing perfect
can I not have tillered? can you not have tillered? can he not have tillered? can we not have tillered? can you not have tillered? can they not have tillered?	can I not have been tillering? can you not have been tillering? can he not have been tillering? can we not have been tillering? can you not have been tillering? can they not have been tillering?