English verb conjugation
CAN USE

Regular verb: use - used - used

Affirmation

Simple form	V-ing form
I can use you can use she can use we can use you can use they can use	I can be using you can be using she can be using we can be using you can be using they can be using
Perfect	V-ing perfect
I can have used you can have used she can have used we can have used you can have used they can have used	I can have been using you can have been using she can have been using we can have been using you can have been using they can have been using

Negation

Simple form	V-ing form
I can't use you can't use she can't use we can't use you can't use they can't use	I can't be using you can't be using she can't be using we can't be using you can't be using they can't be using
Perfect	V-ing perfect
I can't have used you can't have used she can't have used we can't have used you can't have used they can't have used	I can't have been using you can't have been using she can't have been using we can't have been using you can't have been using they can't have been using

Interrogative form

Simple form	V-ing form
can I use? can you use? can she use? can we use? can you use? can they use?	can I be using? can you be using? can she be using? can we be using? can you be using? can they be using?
Perfect	V-ing perfect
can I have used? can you have used? can she have used? can we have used? can you have used? can they have used?	can I have been using? can you have been using? can she have been using? can we have been using? can you have been using? can they have been using?

Interro-negative form

Simple form	V-ing form
can't I use? can't you use? can't she use? can't we use? can't you use? can't they use?	can't I be using? can't you be using? can't she be using? can't we be using? can't you be using? can't they be using?
Perfect	V-ing perfect
can't I have used? can't you have used? can't she have used? can't we have used? can't you have used? can't they have used?	can't I have been using? can't you have been using? can't she have been using? can't we have been using? can't you have been using? can't they have been using?