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 mustn't waddle you mustn't waddle she mustn't waddle we mustn't waddle you mustn't waddle they mustn't waddle
V-ing form
I mustn't be waddling you mustn't be waddling she mustn't be waddling we mustn't be waddling you mustn't be waddling they mustn't be waddling
Perfect
I mustn't have waddled you mustn't have waddled she mustn't have waddled we mustn't have waddled you mustn't have waddled they mustn't have waddled
V-ing perfect
I mustn't have been waddling you mustn't have been waddling she mustn't have been waddling we mustn't have been waddling you mustn't have been waddling they mustn't 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
mustn't I waddle? mustn't you waddle? mustn't she waddle? mustn't we waddle? mustn't you waddle? mustn't they waddle?
V-ing form
mustn't I be waddling? mustn't you be waddling? mustn't she be waddling? mustn't we be waddling? mustn't you be waddling? mustn't they be waddling?
Perfect
mustn't I have waddled? mustn't you have waddled? mustn't she have waddled? mustn't we have waddled? mustn't you have waddled? mustn't they have waddled?
V-ing perfect
mustn't I have been waddling? mustn't you have been waddling? mustn't she have been waddling? mustn't we have been waddling? mustn't you have been waddling? mustn't they have been waddling?