I must oxygenate you must oxygenate she must oxygenate we must oxygenate you must oxygenate they must oxygenate
V-ing form
I must be oxygenating you must be oxygenating she must be oxygenating we must be oxygenating you must be oxygenating they must be oxygenating
Perfect
I must have oxygenated you must have oxygenated she must have oxygenated we must have oxygenated you must have oxygenated they must have oxygenated
V-ing perfect
I must have been oxygenating you must have been oxygenating she must have been oxygenating we must have been oxygenating you must have been oxygenating they must have been oxygenating
Negation
Simple form
I must not oxygenate you must not oxygenate she must not oxygenate we must not oxygenate you must not oxygenate they must not oxygenate
V-ing form
I must not be oxygenating you must not be oxygenating she must not be oxygenating we must not be oxygenating you must not be oxygenating they must not be oxygenating
Perfect
I must not have oxygenated you must not have oxygenated she must not have oxygenated we must not have oxygenated you must not have oxygenated they must not have oxygenated
V-ing perfect
I must not have been oxygenating you must not have been oxygenating she must not have been oxygenating we must not have been oxygenating you must not have been oxygenating they must not have been oxygenating
Interrogative form
Simple form
must I oxygenate? must you oxygenate? must she oxygenate? must we oxygenate? must you oxygenate? must they oxygenate?
V-ing form
must I be oxygenating? must you be oxygenating? must she be oxygenating? must we be oxygenating? must you be oxygenating? must they be oxygenating?
Perfect
must I have oxygenated? must you have oxygenated? must she have oxygenated? must we have oxygenated? must you have oxygenated? must they have oxygenated?
V-ing perfect
must I have been oxygenating? must you have been oxygenating? must she have been oxygenating? must we have been oxygenating? must you have been oxygenating? must they have been oxygenating?
Interro-negative form
Simple form
must I not oxygenate? must you not oxygenate? must she not oxygenate? must we not oxygenate? must you not oxygenate? must they not oxygenate?
V-ing form
must I not be oxygenating? must you not be oxygenating? must she not be oxygenating? must we not be oxygenating? must you not be oxygenating? must they not be oxygenating?
Perfect
must I not have oxygenated? must you not have oxygenated? must she not have oxygenated? must we not have oxygenated? must you not have oxygenated? must they not have oxygenated?
V-ing perfect
must I not have been oxygenating? must you not have been oxygenating? must she not have been oxygenating? must we not have been oxygenating? must you not have been oxygenating? must they not have been oxygenating?