I must contemplate you must contemplate she must contemplate we must contemplate you must contemplate they must contemplate
V-ing form
I must be contemplating you must be contemplating she must be contemplating we must be contemplating you must be contemplating they must be contemplating
Perfect
I must have contemplated you must have contemplated she 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 she 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 she 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 she 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 she 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 she 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 she contemplate? must we contemplate? must you contemplate? must they contemplate?
V-ing form
must I be contemplating? must you be contemplating? must she be contemplating? must we be contemplating? must you be contemplating? must they be contemplating?
Perfect
must I have contemplated? must you have contemplated? must she 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 she 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 she 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 she 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 she 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 she have been contemplating? mustn't we have been contemplating? mustn't you have been contemplating? mustn't they have been contemplating?