must diffract
Verbo regular: diffract - diffracted- diffracted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must diffract
you must diffract
she must diffract
we must diffract
you must diffract
they must diffract 	I must be diffracting
you must be diffracting
she must be diffracting
we must be diffracting
you must be diffracting
they must be diffracting	I must have diffracted
you must have diffracted
she must have diffracted
we must have diffracted
you must have diffracted
they must have diffracted	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not diffract
you must not diffract
she must not diffract
we must not diffract
you must not diffract
they must not diffract 	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	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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I diffract?
must you diffract?
must she diffract?
must we diffract?
must you diffract?
must they diffract? 	must I be diffracting?
must you be diffracting?
must she be diffracting?
must we be diffracting?
must you be diffracting?
must they be diffracting? 	must I have diffracted?
must you have diffracted?
must she have diffracted?
must we have diffracted?
must you have diffracted?
must they have diffracted? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not diffract?
must you not diffract?
must she not diffract?
must we not diffract?
must you not diffract?
must they not diffract? 	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? 	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? 	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?