could overtire
Regular verb: overtire - overtired- overtired

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overtire
you could overtire
he could overtire
we could overtire
you could overtire
they could overtire 	I could be overtiring
you could be overtiring
he could be overtiring
we could be overtiring
you could be overtiring
they could be overtiring	I could have overtired
you could have overtired
he could have overtired
we could have overtired
you could have overtired
they could have overtired	I could have been overtiring
you could have been overtiring
he could have been overtiring
we could have been overtiring
you could have been overtiring
they could have been overtiring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not overtire
you could not overtire
he could not overtire
we could not overtire
you could not overtire
they could not overtire 	I could not be overtiring
you could not be overtiring
he could not be overtiring
we could not be overtiring
you could not be overtiring
they could not be overtiring	I could not have overtired
you could not have overtired
he could not have overtired
we could not have overtired
you could not have overtired
they could not have overtired	I could not have been overtiring
you could not have been overtiring
he could not have been overtiring
we could not have been overtiring
you could not have been overtiring
they could not have been overtiring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overtire?
could you overtire?
could he overtire?
could we overtire?
could you overtire?
could they overtire? 	could I be overtiring?
could you be overtiring?
could he be overtiring?
could we be overtiring?
could you be overtiring?
could they be overtiring? 	could I have overtired?
could you have overtired?
could he have overtired?
could we have overtired?
could you have overtired?
could they have overtired? 	could I have been overtiring?
could you have been overtiring?
could he have been overtiring?
could we have been overtiring?
could you have been overtiring?
could they have been overtiring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not overtire?
could you not overtire?
could he not overtire?
could we not overtire?
could you not overtire?
could they not overtire? 	could I not be overtiring?
could you not be overtiring?
could he not be overtiring?
could we not be overtiring?
could you not be overtiring?
could they not be overtiring? 	could I not have overtired?
could you not have overtired?
could he not have overtired?
could we not have overtired?
could you not have overtired?
could they not have overtired? 	could I not have been overtiring?
could you not have been overtiring?
could he not have been overtiring?
could we not have been overtiring?
could you not have been overtiring?
could they not have been overtiring?