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