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