I may screen you may screen he may screen we may screen you may screen they may screen
V-ing form
I may be screening you may be screening he may be screening we may be screening you may be screening they may be screening
Perfect
I may have screened you may have screened he may have screened we may have screened you may have screened they may have screened
V-ing perfect
I may have been screening you may have been screening he may have been screening we may have been screening you may have been screening they may have been screening
Negation
Simple form
I may not screen you may not screen he may not screen we may not screen you may not screen they may not screen
V-ing form
I may not be screening you may not be screening he may not be screening we may not be screening you may not be screening they may not be screening
Perfect
I may not have screened you may not have screened he may not have screened we may not have screened you may not have screened they may not have screened
V-ing perfect
I may not have been screening you may not have been screening he may not have been screening we may not have been screening you may not have been screening they may not have been screening
Interrogative form
Simple form
may I screen? may you screen? may he screen? may we screen? may you screen? may they screen?
V-ing form
may I be screening? may you be screening? may he be screening? may we be screening? may you be screening? may they be screening?
Perfect
may I have screened? may you have screened? may he have screened? may we have screened? may you have screened? may they have screened?
V-ing perfect
may I have been screening? may you have been screening? may he have been screening? may we have been screening? may you have been screening? may they have been screening?
Interro-negative form
Simple form
may I not screen? may you not screen? may he not screen? may we not screen? may you not screen? may they not screen?
V-ing form
may I not be screening? may you not be screening? may he not be screening? may we not be screening? may you not be screening? may they not be screening?
Perfect
may I not have screened? may you not have screened? may he not have screened? may we not have screened? may you not have screened? may they not have screened?
V-ing perfect
may I not have been screening? may you not have been screening? may he not have been screening? may we not have been screening? may you not have been screening? may they not have been screening?