must postdate
Verbo regular: postdate - postdated- postdated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must postdate
you must postdate
he must postdate
we must postdate
you must postdate
they must postdate 	I must be postdating
you must be postdating
he must be postdating
we must be postdating
you must be postdating
they must be postdating	I must have postdated
you must have postdated
he must have postdated
we must have postdated
you must have postdated
they must have postdated	I must have been postdating
you must have been postdating
he must have been postdating
we must have been postdating
you must have been postdating
they must have been postdating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not postdate
you must not postdate
he must not postdate
we must not postdate
you must not postdate
they must not postdate 	I must not be postdating
you must not be postdating
he must not be postdating
we must not be postdating
you must not be postdating
they must not be postdating	I must not have postdated
you must not have postdated
he must not have postdated
we must not have postdated
you must not have postdated
they must not have postdated	I must not have been postdating
you must not have been postdating
he must not have been postdating
we must not have been postdating
you must not have been postdating
they must not have been postdating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I postdate?
must you postdate?
must he postdate?
must we postdate?
must you postdate?
must they postdate? 	must I be postdating?
must you be postdating?
must he be postdating?
must we be postdating?
must you be postdating?
must they be postdating? 	must I have postdated?
must you have postdated?
must he have postdated?
must we have postdated?
must you have postdated?
must they have postdated? 	must I have been postdating?
must you have been postdating?
must he have been postdating?
must we have been postdating?
must you have been postdating?
must they have been postdating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not postdate?
must you not postdate?
must he not postdate?
must we not postdate?
must you not postdate?
must they not postdate? 	must I not be postdating?
must you not be postdating?
must he not be postdating?
must we not be postdating?
must you not be postdating?
must they not be postdating? 	must I not have postdated?
must you not have postdated?
must he not have postdated?
must we not have postdated?
must you not have postdated?
must they not have postdated? 	must I not have been postdating?
must you not have been postdating?
must he not have been postdating?
must we not have been postdating?
must you not have been postdating?
must they not have been postdating?