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