I must fluctuate you must fluctuate she must fluctuate we must fluctuate you must fluctuate they must fluctuate
V-ing form
I must be fluctuating you must be fluctuating she must be fluctuating we must be fluctuating you must be fluctuating they must be fluctuating
Perfect
I must have fluctuated you must have fluctuated she must have fluctuated we must have fluctuated you must have fluctuated they must have fluctuated
V-ing perfect
I must have been fluctuating you must have been fluctuating she must have been fluctuating we must have been fluctuating you must have been fluctuating they must have been fluctuating
Negation
Simple form
I must not fluctuate you must not fluctuate she must not fluctuate we must not fluctuate you must not fluctuate they must not fluctuate
V-ing form
I must not be fluctuating you must not be fluctuating she must not be fluctuating we must not be fluctuating you must not be fluctuating they must not be fluctuating
Perfect
I must not have fluctuated you must not have fluctuated she must not have fluctuated we must not have fluctuated you must not have fluctuated they must not have fluctuated
V-ing perfect
I must not have been fluctuating you must not have been fluctuating she must not have been fluctuating we must not have been fluctuating you must not have been fluctuating they must not have been fluctuating
Interrogative form
Simple form
must I fluctuate? must you fluctuate? must she fluctuate? must we fluctuate? must you fluctuate? must they fluctuate?
V-ing form
must I be fluctuating? must you be fluctuating? must she be fluctuating? must we be fluctuating? must you be fluctuating? must they be fluctuating?
Perfect
must I have fluctuated? must you have fluctuated? must she have fluctuated? must we have fluctuated? must you have fluctuated? must they have fluctuated?
V-ing perfect
must I have been fluctuating? must you have been fluctuating? must she have been fluctuating? must we have been fluctuating? must you have been fluctuating? must they have been fluctuating?
Interro-negative form
Simple form
must I not fluctuate? must you not fluctuate? must she not fluctuate? must we not fluctuate? must you not fluctuate? must they not fluctuate?
V-ing form
must I not be fluctuating? must you not be fluctuating? must she not be fluctuating? must we not be fluctuating? must you not be fluctuating? must they not be fluctuating?
Perfect
must I not have fluctuated? must you not have fluctuated? must she not have fluctuated? must we not have fluctuated? must you not have fluctuated? must they not have fluctuated?
V-ing perfect
must I not have been fluctuating? must you not have been fluctuating? must she not have been fluctuating? must we not have been fluctuating? must you not have been fluctuating? must they not have been fluctuating?