I must oscillate you must oscillate she must oscillate we must oscillate you must oscillate they must oscillate
V-ing form
I must be oscillating you must be oscillating she must be oscillating we must be oscillating you must be oscillating they must be oscillating
Perfect
I must have oscillated you must have oscillated she must have oscillated we must have oscillated you must have oscillated they must have oscillated
V-ing perfect
I must have been oscillating you must have been oscillating she must have been oscillating we must have been oscillating you must have been oscillating they must have been oscillating
Negation
Simple form
I must not oscillate you must not oscillate she must not oscillate we must not oscillate you must not oscillate they must not oscillate
V-ing form
I must not be oscillating you must not be oscillating she must not be oscillating we must not be oscillating you must not be oscillating they must not be oscillating
Perfect
I must not have oscillated you must not have oscillated she must not have oscillated we must not have oscillated you must not have oscillated they must not have oscillated
V-ing perfect
I must not have been oscillating you must not have been oscillating she must not have been oscillating we must not have been oscillating you must not have been oscillating they must not have been oscillating
Interrogative form
Simple form
must I oscillate? must you oscillate? must she oscillate? must we oscillate? must you oscillate? must they oscillate?
V-ing form
must I be oscillating? must you be oscillating? must she be oscillating? must we be oscillating? must you be oscillating? must they be oscillating?
Perfect
must I have oscillated? must you have oscillated? must she have oscillated? must we have oscillated? must you have oscillated? must they have oscillated?
V-ing perfect
must I have been oscillating? must you have been oscillating? must she have been oscillating? must we have been oscillating? must you have been oscillating? must they have been oscillating?
Interro-negative form
Simple form
must I not oscillate? must you not oscillate? must she not oscillate? must we not oscillate? must you not oscillate? must they not oscillate?
V-ing form
must I not be oscillating? must you not be oscillating? must she not be oscillating? must we not be oscillating? must you not be oscillating? must they not be oscillating?
Perfect
must I not have oscillated? must you not have oscillated? must she not have oscillated? must we not have oscillated? must you not have oscillated? must they not have oscillated?
V-ing perfect
must I not have been oscillating? must you not have been oscillating? must she not have been oscillating? must we not have been oscillating? must you not have been oscillating? must they not have been oscillating?