I must decline you must decline she must decline we must decline you must decline they must decline
V-ing form
I must be declining you must be declining she must be declining we must be declining you must be declining they must be declining
Perfect
I must have declined you must have declined she must have declined we must have declined you must have declined they must have declined
V-ing perfect
I must have been declining you must have been declining she must have been declining we must have been declining you must have been declining they must have been declining
Negation
Simple form
I must not decline you must not decline she must not decline we must not decline you must not decline they must not decline
V-ing form
I must not be declining you must not be declining she must not be declining we must not be declining you must not be declining they must not be declining
Perfect
I must not have declined you must not have declined she must not have declined we must not have declined you must not have declined they must not have declined
V-ing perfect
I must not have been declining you must not have been declining she must not have been declining we must not have been declining you must not have been declining they must not have been declining
Interrogative form
Simple form
must I decline? must you decline? must she decline? must we decline? must you decline? must they decline?
V-ing form
must I be declining? must you be declining? must she be declining? must we be declining? must you be declining? must they be declining?
Perfect
must I have declined? must you have declined? must she have declined? must we have declined? must you have declined? must they have declined?
V-ing perfect
must I have been declining? must you have been declining? must she have been declining? must we have been declining? must you have been declining? must they have been declining?
Interro-negative form
Simple form
must I not decline? must you not decline? must she not decline? must we not decline? must you not decline? must they not decline?
V-ing form
must I not be declining? must you not be declining? must she not be declining? must we not be declining? must you not be declining? must they not be declining?
Perfect
must I not have declined? must you not have declined? must she not have declined? must we not have declined? must you not have declined? must they not have declined?
V-ing perfect
must I not have been declining? must you not have been declining? must she not have been declining? must we not have been declining? must you not have been declining? must they not have been declining?