English verb conjugation
CAN TOUCH

Regular verb: touch - touched - touched

Affirmation

Simple form	V-ing form
I can touch you can touch he can touch we can touch you can touch they can touch	I can be touching you can be touching he can be touching we can be touching you can be touching they can be touching
Perfect	V-ing perfect
I can have touched you can have touched he can have touched we can have touched you can have touched they can have touched	I can have been touching you can have been touching he can have been touching we can have been touching you can have been touching they can have been touching

Negation

Simple form	V-ing form
I cannot touch you cannot touch he cannot touch we cannot touch you cannot touch they cannot touch	I cannot be touching you cannot be touching he cannot be touching we cannot be touching you cannot be touching they cannot be touching
Perfect	V-ing perfect
I cannot have touched you cannot have touched he cannot have touched we cannot have touched you cannot have touched they cannot have touched	I cannot have been touching you cannot have been touching he cannot have been touching we cannot have been touching you cannot have been touching they cannot have been touching

Interrogative form

Simple form	V-ing form
can I touch? can you touch? can he touch? can we touch? can you touch? can they touch?	can I be touching? can you be touching? can he be touching? can we be touching? can you be touching? can they be touching?
Perfect	V-ing perfect
can I have touched? can you have touched? can he have touched? can we have touched? can you have touched? can they have touched?	can I have been touching? can you have been touching? can he have been touching? can we have been touching? can you have been touching? can they have been touching?

Interro-negative form

Simple form	V-ing form
can I not touch? can you not touch? can he not touch? can we not touch? can you not touch? can they not touch?	can I not be touching? can you not be touching? can he not be touching? can we not be touching? can you not be touching? can they not be touching?
Perfect	V-ing perfect
can I not have touched? can you not have touched? can he not have touched? can we not have touched? can you not have touched? can they not have touched?	can I not have been touching? can you not have been touching? can he not have been touching? can we not have been touching? can you not have been touching? can they not have been touching?