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