I must waddle you must waddle she must waddle we must waddle you must waddle they must waddle
V-ing form
I must be waddling you must be waddling she must be waddling we must be waddling you must be waddling they must be waddling
Perfect
I must have waddled you must have waddled she must have waddled we must have waddled you must have waddled they must have waddled
V-ing perfect
I must have been waddling you must have been waddling she must have been waddling we must have been waddling you must have been waddling they must have been waddling
Negation
Simple form
I must not waddle you must not waddle she must not waddle we must not waddle you must not waddle they must not waddle
V-ing form
I must not be waddling you must not be waddling she must not be waddling we must not be waddling you must not be waddling they must not be waddling
Perfect
I must not have waddled you must not have waddled she must not have waddled we must not have waddled you must not have waddled they must not have waddled
V-ing perfect
I must not have been waddling you must not have been waddling she must not have been waddling we must not have been waddling you must not have been waddling they must not have been waddling
Interrogative form
Simple form
must I waddle? must you waddle? must she waddle? must we waddle? must you waddle? must they waddle?
V-ing form
must I be waddling? must you be waddling? must she be waddling? must we be waddling? must you be waddling? must they be waddling?
Perfect
must I have waddled? must you have waddled? must she have waddled? must we have waddled? must you have waddled? must they have waddled?
V-ing perfect
must I have been waddling? must you have been waddling? must she have been waddling? must we have been waddling? must you have been waddling? must they have been waddling?
Interro-negative form
Simple form
must I not waddle? must you not waddle? must she not waddle? must we not waddle? must you not waddle? must they not waddle?
V-ing form
must I not be waddling? must you not be waddling? must she not be waddling? must we not be waddling? must you not be waddling? must they not be waddling?
Perfect
must I not have waddled? must you not have waddled? must she not have waddled? must we not have waddled? must you not have waddled? must they not have waddled?
V-ing perfect
must I not have been waddling? must you not have been waddling? must she not have been waddling? must we not have been waddling? must you not have been waddling? must they not have been waddling?