I must crouch you must crouch she must crouch we must crouch you must crouch they must crouch
Forme en V-ing
I must be crouching you must be crouching she must be crouching we must be crouching you must be crouching they must be crouching
Perfect
I must have crouched you must have crouched she must have crouched we must have crouched you must have crouched they must have crouched
Perfect en V-ing
I must have been crouching you must have been crouching she must have been crouching we must have been crouching you must have been crouching they must have been crouching
Négation
Forme simple
I must not crouch you must not crouch she must not crouch we must not crouch you must not crouch they must not crouch
Forme en V-ing
I must not be crouching you must not be crouching she must not be crouching we must not be crouching you must not be crouching they must not be crouching
Perfect
I must not have crouched you must not have crouched she must not have crouched we must not have crouched you must not have crouched they must not have crouched
Perfect en V-ing
I must not have been crouching you must not have been crouching she must not have been crouching we must not have been crouching you must not have been crouching they must not have been crouching
Forme interrogative
Forme simple
must I crouch? must you crouch? must she crouch? must we crouch? must you crouch? must they crouch?
Forme en V-ing
must I be crouching? must you be crouching? must she be crouching? must we be crouching? must you be crouching? must they be crouching?
Perfect
must I have crouched? must you have crouched? must she have crouched? must we have crouched? must you have crouched? must they have crouched?
Perfect en V-ing
must I have been crouching? must you have been crouching? must she have been crouching? must we have been crouching? must you have been crouching? must they have been crouching?
Forme interro-négative
Forme simple
must I not crouch? must you not crouch? must she not crouch? must we not crouch? must you not crouch? must they not crouch?
Forme en V-ing
must I not be crouching? must you not be crouching? must she not be crouching? must we not be crouching? must you not be crouching? must they not be crouching?
Perfect
must I not have crouched? must you not have crouched? must she not have crouched? must we not have crouched? must you not have crouched? must they not have crouched?
Perfect en V-ing
must I not have been crouching? must you not have been crouching? must she not have been crouching? must we not have been crouching? must you not have been crouching? must they not have been crouching?