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