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 can't touch you can't touch he can't touch we can't touch you can't touch they can't touch	I can't be touching you can't be touching he can't be touching we can't be touching you can't be touching they can't be touching
Perfect	V-ing perfect
I can't have touched you can't have touched he can't have touched we can't have touched you can't have touched they can't have touched	I can't have been touching you can't have been touching he can't have been touching we can't have been touching you can't have been touching they can't 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't I touch? can't you touch? can't he touch? can't we touch? can't you touch? can't they touch?	can't I be touching? can't you be touching? can't he be touching? can't we be touching? can't you be touching? can't they be touching?
Perfect	V-ing perfect
can't I have touched? can't you have touched? can't he have touched? can't we have touched? can't you have touched? can't they have touched?	can't I have been touching? can't you have been touching? can't he have been touching? can't we have been touching? can't you have been touching? can't they have been touching?