English verb conjugation
CAN SCREEN

Regular verb: screen - screened - screened

Affirmation

Simple form	V-ing form
I can screen you can screen she can screen we can screen you can screen they can screen	I can be screening you can be screening she can be screening we can be screening you can be screening they can be screening
Perfect	V-ing perfect
I can have screened you can have screened she can have screened we can have screened you can have screened they can have screened	I can have been screening you can have been screening she can have been screening we can have been screening you can have been screening they can have been screening

Negation

Simple form	V-ing form
I can't screen you can't screen she can't screen we can't screen you can't screen they can't screen	I can't be screening you can't be screening she can't be screening we can't be screening you can't be screening they can't be screening
Perfect	V-ing perfect
I can't have screened you can't have screened she can't have screened we can't have screened you can't have screened they can't have screened	I can't have been screening you can't have been screening she can't have been screening we can't have been screening you can't have been screening they can't have been screening

Interrogative form

Simple form	V-ing form
can I screen? can you screen? can she screen? can we screen? can you screen? can they screen?	can I be screening? can you be screening? can she be screening? can we be screening? can you be screening? can they be screening?
Perfect	V-ing perfect
can I have screened? can you have screened? can she have screened? can we have screened? can you have screened? can they have screened?	can I have been screening? can you have been screening? can she have been screening? can we have been screening? can you have been screening? can they have been screening?

Interro-negative form

Simple form	V-ing form
can't I screen? can't you screen? can't she screen? can't we screen? can't you screen? can't they screen?	can't I be screening? can't you be screening? can't she be screening? can't we be screening? can't you be screening? can't they be screening?
Perfect	V-ing perfect
can't I have screened? can't you have screened? can't she have screened? can't we have screened? can't you have screened? can't they have screened?	can't I have been screening? can't you have been screening? can't she have been screening? can't we have been screening? can't you have been screening? can't they have been screening?