I must aestivate you must aestivate she must aestivate we must aestivate you must aestivate they must aestivate
V-ing form
I must be aestivating you must be aestivating she must be aestivating we must be aestivating you must be aestivating they must be aestivating
Perfect
I must have aestivated you must have aestivated she must have aestivated we must have aestivated you must have aestivated they must have aestivated
V-ing perfect
I must have been aestivating you must have been aestivating she must have been aestivating we must have been aestivating you must have been aestivating they must have been aestivating
Negation
Simple form
I must not aestivate you must not aestivate she must not aestivate we must not aestivate you must not aestivate they must not aestivate
V-ing form
I must not be aestivating you must not be aestivating she must not be aestivating we must not be aestivating you must not be aestivating they must not be aestivating
Perfect
I must not have aestivated you must not have aestivated she must not have aestivated we must not have aestivated you must not have aestivated they must not have aestivated
V-ing perfect
I must not have been aestivating you must not have been aestivating she must not have been aestivating we must not have been aestivating you must not have been aestivating they must not have been aestivating
Interrogative form
Simple form
must I aestivate? must you aestivate? must she aestivate? must we aestivate? must you aestivate? must they aestivate?
V-ing form
must I be aestivating? must you be aestivating? must she be aestivating? must we be aestivating? must you be aestivating? must they be aestivating?
Perfect
must I have aestivated? must you have aestivated? must she have aestivated? must we have aestivated? must you have aestivated? must they have aestivated?
V-ing perfect
must I have been aestivating? must you have been aestivating? must she have been aestivating? must we have been aestivating? must you have been aestivating? must they have been aestivating?
Interro-negative form
Simple form
must I not aestivate? must you not aestivate? must she not aestivate? must we not aestivate? must you not aestivate? must they not aestivate?
V-ing form
must I not be aestivating? must you not be aestivating? must she not be aestivating? must we not be aestivating? must you not be aestivating? must they not be aestivating?
Perfect
must I not have aestivated? must you not have aestivated? must she not have aestivated? must we not have aestivated? must you not have aestivated? must they not have aestivated?
V-ing perfect
must I not have been aestivating? must you not have been aestivating? must she not have been aestivating? must we not have been aestivating? must you not have been aestivating? must they not have been aestivating?