I must diffract you must diffract she must diffract we must diffract you must diffract they must diffract
V-ing form
I must be diffracting you must be diffracting she must be diffracting we must be diffracting you must be diffracting they must be diffracting
Perfect
I must have diffracted you must have diffracted she must have diffracted we must have diffracted you must have diffracted they must have diffracted
V-ing perfect
I must have been diffracting you must have been diffracting she must have been diffracting we must have been diffracting you must have been diffracting they must have been diffracting
Negation
Simple form
I must not diffract you must not diffract she must not diffract we must not diffract you must not diffract they must not diffract
V-ing form
I must not be diffracting you must not be diffracting she must not be diffracting we must not be diffracting you must not be diffracting they must not be diffracting
Perfect
I must not have diffracted you must not have diffracted she must not have diffracted we must not have diffracted you must not have diffracted they must not have diffracted
V-ing perfect
I must not have been diffracting you must not have been diffracting she must not have been diffracting we must not have been diffracting you must not have been diffracting they must not have been diffracting
Interrogative form
Simple form
must I diffract? must you diffract? must she diffract? must we diffract? must you diffract? must they diffract?
V-ing form
must I be diffracting? must you be diffracting? must she be diffracting? must we be diffracting? must you be diffracting? must they be diffracting?
Perfect
must I have diffracted? must you have diffracted? must she have diffracted? must we have diffracted? must you have diffracted? must they have diffracted?
V-ing perfect
must I have been diffracting? must you have been diffracting? must she have been diffracting? must we have been diffracting? must you have been diffracting? must they have been diffracting?
Interro-negative form
Simple form
must I not diffract? must you not diffract? must she not diffract? must we not diffract? must you not diffract? must they not diffract?
V-ing form
must I not be diffracting? must you not be diffracting? must she not be diffracting? must we not be diffracting? must you not be diffracting? must they not be diffracting?
Perfect
must I not have diffracted? must you not have diffracted? must she not have diffracted? must we not have diffracted? must you not have diffracted? must they not have diffracted?
V-ing perfect
must I not have been diffracting? must you not have been diffracting? must she not have been diffracting? must we not have been diffracting? must you not have been diffracting? must they not have been diffracting?