English verb conjugation
CAN CALL

Regular verb: call - called - called

Affirmation

Simple form	V-ing form
I can call you can call he can call we can call you can call they can call	I can be calling you can be calling he can be calling we can be calling you can be calling they can be calling
Perfect	V-ing perfect
I can have called you can have called he can have called we can have called you can have called they can have called	I can have been calling you can have been calling he can have been calling we can have been calling you can have been calling they can have been calling

Negation

Simple form	V-ing form
I can't call you can't call he can't call we can't call you can't call they can't call	I can't be calling you can't be calling he can't be calling we can't be calling you can't be calling they can't be calling
Perfect	V-ing perfect
I can't have called you can't have called he can't have called we can't have called you can't have called they can't have called	I can't have been calling you can't have been calling he can't have been calling we can't have been calling you can't have been calling they can't have been calling

Interrogative form

Simple form	V-ing form
can I call? can you call? can he call? can we call? can you call? can they call?	can I be calling? can you be calling? can he be calling? can we be calling? can you be calling? can they be calling?
Perfect	V-ing perfect
can I have called? can you have called? can he have called? can we have called? can you have called? can they have called?	can I have been calling? can you have been calling? can he have been calling? can we have been calling? can you have been calling? can they have been calling?

Interro-negative form

Simple form	V-ing form
can't I call? can't you call? can't he call? can't we call? can't you call? can't they call?	can't I be calling? can't you be calling? can't he be calling? can't we be calling? can't you be calling? can't they be calling?
Perfect	V-ing perfect
can't I have called? can't you have called? can't he have called? can't we have called? can't you have called? can't they have called?	can't I have been calling? can't you have been calling? can't he have been calling? can't we have been calling? can't you have been calling? can't they have been calling?