I must attenuate you must attenuate she must attenuate we must attenuate you must attenuate they must attenuate
V-ing form
I must be attenuating you must be attenuating she must be attenuating we must be attenuating you must be attenuating they must be attenuating
Perfect
I must have attenuated you must have attenuated she must have attenuated we must have attenuated you must have attenuated they must have attenuated
V-ing perfect
I must have been attenuating you must have been attenuating she must have been attenuating we must have been attenuating you must have been attenuating they must have been attenuating
Negation
Simple form
I must not attenuate you must not attenuate she must not attenuate we must not attenuate you must not attenuate they must not attenuate
V-ing form
I must not be attenuating you must not be attenuating she must not be attenuating we must not be attenuating you must not be attenuating they must not be attenuating
Perfect
I must not have attenuated you must not have attenuated she must not have attenuated we must not have attenuated you must not have attenuated they must not have attenuated
V-ing perfect
I must not have been attenuating you must not have been attenuating she must not have been attenuating we must not have been attenuating you must not have been attenuating they must not have been attenuating
Interrogative form
Simple form
must I attenuate? must you attenuate? must she attenuate? must we attenuate? must you attenuate? must they attenuate?
V-ing form
must I be attenuating? must you be attenuating? must she be attenuating? must we be attenuating? must you be attenuating? must they be attenuating?
Perfect
must I have attenuated? must you have attenuated? must she have attenuated? must we have attenuated? must you have attenuated? must they have attenuated?
V-ing perfect
must I have been attenuating? must you have been attenuating? must she have been attenuating? must we have been attenuating? must you have been attenuating? must they have been attenuating?
Interro-negative form
Simple form
must I not attenuate? must you not attenuate? must she not attenuate? must we not attenuate? must you not attenuate? must they not attenuate?
V-ing form
must I not be attenuating? must you not be attenuating? must she not be attenuating? must we not be attenuating? must you not be attenuating? must they not be attenuating?
Perfect
must I not have attenuated? must you not have attenuated? must she not have attenuated? must we not have attenuated? must you not have attenuated? must they not have attenuated?
V-ing perfect
must I not have been attenuating? must you not have been attenuating? must she not have been attenuating? must we not have been attenuating? must you not have been attenuating? must they not have been attenuating?