I must encircle you must encircle he must encircle we must encircle you must encircle they must encircle
V-ing form
I must be encircling you must be encircling he must be encircling we must be encircling you must be encircling they must be encircling
Perfect
I must have encircled you must have encircled he must have encircled we must have encircled you must have encircled they must have encircled
V-ing perfect
I must have been encircling you must have been encircling he must have been encircling we must have been encircling you must have been encircling they must have been encircling
Negation
Simple form
I must not encircle you must not encircle he must not encircle we must not encircle you must not encircle they must not encircle
V-ing form
I must not be encircling you must not be encircling he must not be encircling we must not be encircling you must not be encircling they must not be encircling
Perfect
I must not have encircled you must not have encircled he must not have encircled we must not have encircled you must not have encircled they must not have encircled
V-ing perfect
I must not have been encircling you must not have been encircling he must not have been encircling we must not have been encircling you must not have been encircling they must not have been encircling
Interrogative form
Simple form
must I encircle? must you encircle? must he encircle? must we encircle? must you encircle? must they encircle?
V-ing form
must I be encircling? must you be encircling? must he be encircling? must we be encircling? must you be encircling? must they be encircling?
Perfect
must I have encircled? must you have encircled? must he have encircled? must we have encircled? must you have encircled? must they have encircled?
V-ing perfect
must I have been encircling? must you have been encircling? must he have been encircling? must we have been encircling? must you have been encircling? must they have been encircling?
Interro-negative form
Simple form
must I not encircle? must you not encircle? must he not encircle? must we not encircle? must you not encircle? must they not encircle?
V-ing form
must I not be encircling? must you not be encircling? must he not be encircling? must we not be encircling? must you not be encircling? must they not be encircling?
Perfect
must I not have encircled? must you not have encircled? must he not have encircled? must we not have encircled? must you not have encircled? must they not have encircled?
V-ing perfect
must I not have been encircling? must you not have been encircling? must he not have been encircling? must we not have been encircling? must you not have been encircling? must they not have been encircling?