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