I must trustee you must trustee he must trustee we must trustee you must trustee they must trustee
V-ing form
I must be trusteeing you must be trusteeing he must be trusteeing we must be trusteeing you must be trusteeing they must be trusteeing
Perfect
I must have trusteed you must have trusteed he must have trusteed we must have trusteed you must have trusteed they must have trusteed
V-ing perfect
I must have been trusteeing you must have been trusteeing he must have been trusteeing we must have been trusteeing you must have been trusteeing they must have been trusteeing
Negation
Simple form
I mustn't trustee you mustn't trustee he mustn't trustee we mustn't trustee you mustn't trustee they mustn't trustee
V-ing form
I mustn't be trusteeing you mustn't be trusteeing he mustn't be trusteeing we mustn't be trusteeing you mustn't be trusteeing they mustn't be trusteeing
Perfect
I mustn't have trusteed you mustn't have trusteed he mustn't have trusteed we mustn't have trusteed you mustn't have trusteed they mustn't have trusteed
V-ing perfect
I mustn't have been trusteeing you mustn't have been trusteeing he mustn't have been trusteeing we mustn't have been trusteeing you mustn't have been trusteeing they mustn't have been trusteeing
Interrogative form
Simple form
must I trustee? must you trustee? must he trustee? must we trustee? must you trustee? must they trustee?
V-ing form
must I be trusteeing? must you be trusteeing? must he be trusteeing? must we be trusteeing? must you be trusteeing? must they be trusteeing?
Perfect
must I have trusteed? must you have trusteed? must he have trusteed? must we have trusteed? must you have trusteed? must they have trusteed?
V-ing perfect
must I have been trusteeing? must you have been trusteeing? must he have been trusteeing? must we have been trusteeing? must you have been trusteeing? must they have been trusteeing?
Interro-negative form
Simple form
mustn't I trustee? mustn't you trustee? mustn't he trustee? mustn't we trustee? mustn't you trustee? mustn't they trustee?
V-ing form
mustn't I be trusteeing? mustn't you be trusteeing? mustn't he be trusteeing? mustn't we be trusteeing? mustn't you be trusteeing? mustn't they be trusteeing?
Perfect
mustn't I have trusteed? mustn't you have trusteed? mustn't he have trusteed? mustn't we have trusteed? mustn't you have trusteed? mustn't they have trusteed?
V-ing perfect
mustn't I have been trusteeing? mustn't you have been trusteeing? mustn't he have been trusteeing? mustn't we have been trusteeing? mustn't you have been trusteeing? mustn't they have been trusteeing?