I must mate you must mate she must mate we must mate you must mate they must mate
V-ing form
I must be mating you must be mating she must be mating we must be mating you must be mating they must be mating
Perfect
I must have mated you must have mated she must have mated we must have mated you must have mated they must have mated
V-ing perfect
I must have been mating you must have been mating she must have been mating we must have been mating you must have been mating they must have been mating
Negation
Simple form
I mustn't mate you mustn't mate she mustn't mate we mustn't mate you mustn't mate they mustn't mate
V-ing form
I mustn't be mating you mustn't be mating she mustn't be mating we mustn't be mating you mustn't be mating they mustn't be mating
Perfect
I mustn't have mated you mustn't have mated she mustn't have mated we mustn't have mated you mustn't have mated they mustn't have mated
V-ing perfect
I mustn't have been mating you mustn't have been mating she mustn't have been mating we mustn't have been mating you mustn't have been mating they mustn't have been mating
Interrogative form
Simple form
must I mate? must you mate? must she mate? must we mate? must you mate? must they mate?
V-ing form
must I be mating? must you be mating? must she be mating? must we be mating? must you be mating? must they be mating?
Perfect
must I have mated? must you have mated? must she have mated? must we have mated? must you have mated? must they have mated?
V-ing perfect
must I have been mating? must you have been mating? must she have been mating? must we have been mating? must you have been mating? must they have been mating?
Interro-negative form
Simple form
mustn't I mate? mustn't you mate? mustn't she mate? mustn't we mate? mustn't you mate? mustn't they mate?
V-ing form
mustn't I be mating? mustn't you be mating? mustn't she be mating? mustn't we be mating? mustn't you be mating? mustn't they be mating?
Perfect
mustn't I have mated? mustn't you have mated? mustn't she have mated? mustn't we have mated? mustn't you have mated? mustn't they have mated?
V-ing perfect
mustn't I have been mating? mustn't you have been mating? mustn't she have been mating? mustn't we have been mating? mustn't you have been mating? mustn't they have been mating?