I must stroll you must stroll she must stroll we must stroll you must stroll they must stroll
V-ing form
I must be strolling you must be strolling she must be strolling we must be strolling you must be strolling they must be strolling
Perfect
I must have strolled you must have strolled she must have strolled we must have strolled you must have strolled they must have strolled
V-ing perfect
I must have been strolling you must have been strolling she must have been strolling we must have been strolling you must have been strolling they must have been strolling
Negation
Simple form
I must not stroll you must not stroll she must not stroll we must not stroll you must not stroll they must not stroll
V-ing form
I must not be strolling you must not be strolling she must not be strolling we must not be strolling you must not be strolling they must not be strolling
Perfect
I must not have strolled you must not have strolled she must not have strolled we must not have strolled you must not have strolled they must not have strolled
V-ing perfect
I must not have been strolling you must not have been strolling she must not have been strolling we must not have been strolling you must not have been strolling they must not have been strolling
Interrogative form
Simple form
must I stroll? must you stroll? must she stroll? must we stroll? must you stroll? must they stroll?
V-ing form
must I be strolling? must you be strolling? must she be strolling? must we be strolling? must you be strolling? must they be strolling?
Perfect
must I have strolled? must you have strolled? must she have strolled? must we have strolled? must you have strolled? must they have strolled?
V-ing perfect
must I have been strolling? must you have been strolling? must she have been strolling? must we have been strolling? must you have been strolling? must they have been strolling?
Interro-negative form
Simple form
must I not stroll? must you not stroll? must she not stroll? must we not stroll? must you not stroll? must they not stroll?
V-ing form
must I not be strolling? must you not be strolling? must she not be strolling? must we not be strolling? must you not be strolling? must they not be strolling?
Perfect
must I not have strolled? must you not have strolled? must she not have strolled? must we not have strolled? must you not have strolled? must they not have strolled?
V-ing perfect
must I not have been strolling? must you not have been strolling? must she not have been strolling? must we not have been strolling? must you not have been strolling? must they not have been strolling?