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