can postdate
Regular verb: postdate - postdated- postdated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can postdate
you can postdate
she can postdate
we can postdate
you can postdate
they can postdate 	I can be postdating
you can be postdating
she can be postdating
we can be postdating
you can be postdating
they can be postdating	I can have postdated
you can have postdated
she can have postdated
we can have postdated
you can have postdated
they can have postdated	I can have been postdating
you can have been postdating
she can have been postdating
we can have been postdating
you can have been postdating
they can have been postdating	

Negation 	
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I can't postdate
you can't postdate
she can't postdate
we can't postdate
you can't postdate
they can't postdate 	I can't be postdating
you can't be postdating
she can't be postdating
we can't be postdating
you can't be postdating
they can't be postdating	I can't have postdated
you can't have postdated
she can't have postdated
we can't have postdated
you can't have postdated
they can't have postdated	I can't have been postdating
you can't have been postdating
she can't have been postdating
we can't have been postdating
you can't have been postdating
they can't have been postdating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I postdate?
can you postdate?
can she postdate?
can we postdate?
can you postdate?
can they postdate? 	can I be postdating?
can you be postdating?
can she be postdating?
can we be postdating?
can you be postdating?
can they be postdating? 	can I have postdated?
can you have postdated?
can she have postdated?
can we have postdated?
can you have postdated?
can they have postdated? 	can I have been postdating?
can you have been postdating?
can she have been postdating?
can we have been postdating?
can you have been postdating?
can they have been postdating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I postdate?
can't you postdate?
can't she postdate?
can't we postdate?
can't you postdate?
can't they postdate? 	can't I be postdating?
can't you be postdating?
can't she be postdating?
can't we be postdating?
can't you be postdating?
can't they be postdating? 	can't I have postdated?
can't you have postdated?
can't she have postdated?
can't we have postdated?
can't you have postdated?
can't they have postdated? 	can't I have been postdating?
can't you have been postdating?
can't she have been postdating?
can't we have been postdating?
can't you have been postdating?
can't they have been postdating?