can postfix
Regular verb: postfix - postfixed- postfixed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can postfix
you can postfix
she can postfix
we can postfix
you can postfix
they can postfix 	I can be postfixing
you can be postfixing
she can be postfixing
we can be postfixing
you can be postfixing
they can be postfixing	I can have postfixed
you can have postfixed
she can have postfixed
we can have postfixed
you can have postfixed
they can have postfixed	I can have been postfixing
you can have been postfixing
she can have been postfixing
we can have been postfixing
you can have been postfixing
they can have been postfixing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't postfix
you can't postfix
she can't postfix
we can't postfix
you can't postfix
they can't postfix 	I can't be postfixing
you can't be postfixing
she can't be postfixing
we can't be postfixing
you can't be postfixing
they can't be postfixing	I can't have postfixed
you can't have postfixed
she can't have postfixed
we can't have postfixed
you can't have postfixed
they can't have postfixed	I can't have been postfixing
you can't have been postfixing
she can't have been postfixing
we can't have been postfixing
you can't have been postfixing
they can't have been postfixing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I postfix?
can you postfix?
can she postfix?
can we postfix?
can you postfix?
can they postfix? 	can I be postfixing?
can you be postfixing?
can she be postfixing?
can we be postfixing?
can you be postfixing?
can they be postfixing? 	can I have postfixed?
can you have postfixed?
can she have postfixed?
can we have postfixed?
can you have postfixed?
can they have postfixed? 	can I have been postfixing?
can you have been postfixing?
can she have been postfixing?
can we have been postfixing?
can you have been postfixing?
can they have been postfixing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I postfix?
can't you postfix?
can't she postfix?
can't we postfix?
can't you postfix?
can't they postfix? 	can't I be postfixing?
can't you be postfixing?
can't she be postfixing?
can't we be postfixing?
can't you be postfixing?
can't they be postfixing? 	can't I have postfixed?
can't you have postfixed?
can't she have postfixed?
can't we have postfixed?
can't you have postfixed?
can't they have postfixed? 	can't I have been postfixing?
can't you have been postfixing?
can't she have been postfixing?
can't we have been postfixing?
can't you have been postfixing?
can't they have been postfixing?