I must befuddle you must befuddle he must befuddle we must befuddle you must befuddle they must befuddle
V-ing form
I must be befuddling you must be befuddling he must be befuddling we must be befuddling you must be befuddling they must be befuddling
Perfect
I must have befuddled you must have befuddled he must have befuddled we must have befuddled you must have befuddled they must have befuddled
V-ing perfect
I must have been befuddling you must have been befuddling he must have been befuddling we must have been befuddling you must have been befuddling they must have been befuddling
Negation
Simple form
I must not befuddle you must not befuddle he must not befuddle we must not befuddle you must not befuddle they must not befuddle
V-ing form
I must not be befuddling you must not be befuddling he must not be befuddling we must not be befuddling you must not be befuddling they must not be befuddling
Perfect
I must not have befuddled you must not have befuddled he must not have befuddled we must not have befuddled you must not have befuddled they must not have befuddled
V-ing perfect
I must not have been befuddling you must not have been befuddling he must not have been befuddling we must not have been befuddling you must not have been befuddling they must not have been befuddling
Interrogative form
Simple form
must I befuddle? must you befuddle? must he befuddle? must we befuddle? must you befuddle? must they befuddle?
V-ing form
must I be befuddling? must you be befuddling? must he be befuddling? must we be befuddling? must you be befuddling? must they be befuddling?
Perfect
must I have befuddled? must you have befuddled? must he have befuddled? must we have befuddled? must you have befuddled? must they have befuddled?
V-ing perfect
must I have been befuddling? must you have been befuddling? must he have been befuddling? must we have been befuddling? must you have been befuddling? must they have been befuddling?
Interro-negative form
Simple form
must I not befuddle? must you not befuddle? must he not befuddle? must we not befuddle? must you not befuddle? must they not befuddle?
V-ing form
must I not be befuddling? must you not be befuddling? must he not be befuddling? must we not be befuddling? must you not be befuddling? must they not be befuddling?
Perfect
must I not have befuddled? must you not have befuddled? must he not have befuddled? must we not have befuddled? must you not have befuddled? must they not have befuddled?
V-ing perfect
must I not have been befuddling? must you not have been befuddling? must he not have been befuddling? must we not have been befuddling? must you not have been befuddling? must they not have been befuddling?