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