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