could retire
Regular verb: retire - retired- retired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could retire
you could retire
he could retire
we could retire
you could retire
they could retire 	I could be retiring
you could be retiring
he could be retiring
we could be retiring
you could be retiring
they could be retiring	I could have retired
you could have retired
he could have retired
we could have retired
you could have retired
they could have retired	I could have been retiring
you could have been retiring
he could have been retiring
we could have been retiring
you could have been retiring
they could have been retiring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not retire
you could not retire
he could not retire
we could not retire
you could not retire
they could not retire 	I could not be retiring
you could not be retiring
he could not be retiring
we could not be retiring
you could not be retiring
they could not be retiring	I could not have retired
you could not have retired
he could not have retired
we could not have retired
you could not have retired
they could not have retired	I could not have been retiring
you could not have been retiring
he could not have been retiring
we could not have been retiring
you could not have been retiring
they could not have been retiring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I retire?
could you retire?
could he retire?
could we retire?
could you retire?
could they retire? 	could I be retiring?
could you be retiring?
could he be retiring?
could we be retiring?
could you be retiring?
could they be retiring? 	could I have retired?
could you have retired?
could he have retired?
could we have retired?
could you have retired?
could they have retired? 	could I have been retiring?
could you have been retiring?
could he have been retiring?
could we have been retiring?
could you have been retiring?
could they have been retiring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not retire?
could you not retire?
could he not retire?
could we not retire?
could you not retire?
could they not retire? 	could I not be retiring?
could you not be retiring?
could he not be retiring?
could we not be retiring?
could you not be retiring?
could they not be retiring? 	could I not have retired?
could you not have retired?
could he not have retired?
could we not have retired?
could you not have retired?
could they not have retired? 	could I not have been retiring?
could you not have been retiring?
could he not have been retiring?
could we not have been retiring?
could you not have been retiring?
could they not have been retiring?