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 must not baffle you must not baffle she must not baffle we must not baffle you must not baffle they must not baffle
V-ing form
I must not be baffling you must not be baffling she must not be baffling we must not be baffling you must not be baffling they must not be baffling
Perfect
I must not have baffled you must not have baffled she must not have baffled we must not have baffled you must not have baffled they must not have baffled
V-ing perfect
I must not have been baffling you must not have been baffling she must not have been baffling we must not have been baffling you must not have been baffling they must not 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
must I not baffle? must you not baffle? must she not baffle? must we not baffle? must you not baffle? must they not baffle?
V-ing form
must I not be baffling? must you not be baffling? must she not be baffling? must we not be baffling? must you not be baffling? must they not be baffling?
Perfect
must I not have baffled? must you not have baffled? must she not have baffled? must we not have baffled? must you not have baffled? must they not have baffled?
V-ing perfect
must I not have been baffling? must you not have been baffling? must she not have been baffling? must we not have been baffling? must you not have been baffling? must they not have been baffling?