I must waffle you must waffle she must waffle we must waffle you must waffle they must waffle
V-ing form
I must be waffling you must be waffling she must be waffling we must be waffling you must be waffling they must be waffling
Perfect
I must have waffled you must have waffled she must have waffled we must have waffled you must have waffled they must have waffled
V-ing perfect
I must have been waffling you must have been waffling she must have been waffling we must have been waffling you must have been waffling they must have been waffling
Negation
Simple form
I mustn't waffle you mustn't waffle she mustn't waffle we mustn't waffle you mustn't waffle they mustn't waffle
V-ing form
I mustn't be waffling you mustn't be waffling she mustn't be waffling we mustn't be waffling you mustn't be waffling they mustn't be waffling
Perfect
I mustn't have waffled you mustn't have waffled she mustn't have waffled we mustn't have waffled you mustn't have waffled they mustn't have waffled
V-ing perfect
I mustn't have been waffling you mustn't have been waffling she mustn't have been waffling we mustn't have been waffling you mustn't have been waffling they mustn't have been waffling
Interrogative form
Simple form
must I waffle? must you waffle? must she waffle? must we waffle? must you waffle? must they waffle?
V-ing form
must I be waffling? must you be waffling? must she be waffling? must we be waffling? must you be waffling? must they be waffling?
Perfect
must I have waffled? must you have waffled? must she have waffled? must we have waffled? must you have waffled? must they have waffled?
V-ing perfect
must I have been waffling? must you have been waffling? must she have been waffling? must we have been waffling? must you have been waffling? must they have been waffling?
Interro-negative form
Simple form
mustn't I waffle? mustn't you waffle? mustn't she waffle? mustn't we waffle? mustn't you waffle? mustn't they waffle?
V-ing form
mustn't I be waffling? mustn't you be waffling? mustn't she be waffling? mustn't we be waffling? mustn't you be waffling? mustn't they be waffling?
Perfect
mustn't I have waffled? mustn't you have waffled? mustn't she have waffled? mustn't we have waffled? mustn't you have waffled? mustn't they have waffled?
V-ing perfect
mustn't I have been waffling? mustn't you have been waffling? mustn't she have been waffling? mustn't we have been waffling? mustn't you have been waffling? mustn't they have been waffling?