English verb conjugation
CAN CONTACT

Regular verb: contact - contacted - contacted

Affirmation

Simple form	V-ing form
I can contact you can contact he can contact we can contact you can contact they can contact	I can be contacting you can be contacting he can be contacting we can be contacting you can be contacting they can be contacting
Perfect	V-ing perfect
I can have contacted you can have contacted he can have contacted we can have contacted you can have contacted they can have contacted	I can have been contacting you can have been contacting he can have been contacting we can have been contacting you can have been contacting they can have been contacting

Negation

Simple form	V-ing form
I can't contact you can't contact he can't contact we can't contact you can't contact they can't contact	I can't be contacting you can't be contacting he can't be contacting we can't be contacting you can't be contacting they can't be contacting
Perfect	V-ing perfect
I can't have contacted you can't have contacted he can't have contacted we can't have contacted you can't have contacted they can't have contacted	I can't have been contacting you can't have been contacting he can't have been contacting we can't have been contacting you can't have been contacting they can't have been contacting

Interrogative form

Simple form	V-ing form
can I contact? can you contact? can he contact? can we contact? can you contact? can they contact?	can I be contacting? can you be contacting? can he be contacting? can we be contacting? can you be contacting? can they be contacting?
Perfect	V-ing perfect
can I have contacted? can you have contacted? can he have contacted? can we have contacted? can you have contacted? can they have contacted?	can I have been contacting? can you have been contacting? can he have been contacting? can we have been contacting? can you have been contacting? can they have been contacting?

Interro-negative form

Simple form	V-ing form
can't I contact? can't you contact? can't he contact? can't we contact? can't you contact? can't they contact?	can't I be contacting? can't you be contacting? can't he be contacting? can't we be contacting? can't you be contacting? can't they be contacting?
Perfect	V-ing perfect
can't I have contacted? can't you have contacted? can't he have contacted? can't we have contacted? can't you have contacted? can't they have contacted?	can't I have been contacting? can't you have been contacting? can't he have been contacting? can't we have been contacting? can't you have been contacting? can't they have been contacting?