could overwrite
Irregular verb: overwrite - overwrote- overwritten

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overwrite
you could overwrite
he could overwrite
we could overwrite
you could overwrite
they could overwrite 	I could be overwriting
you could be overwriting
he could be overwriting
we could be overwriting
you could be overwriting
they could be overwriting	I could have overwritten
you could have overwritten
he could have overwritten
we could have overwritten
you could have overwritten
they could have overwritten	I could have been overwriting
you could have been overwriting
he could have been overwriting
we could have been overwriting
you could have been overwriting
they could have been overwriting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not overwrite
you could not overwrite
he could not overwrite
we could not overwrite
you could not overwrite
they could not overwrite 	I could not be overwriting
you could not be overwriting
he could not be overwriting
we could not be overwriting
you could not be overwriting
they could not be overwriting	I could not have overwritten
you could not have overwritten
he could not have overwritten
we could not have overwritten
you could not have overwritten
they could not have overwritten	I could not have been overwriting
you could not have been overwriting
he could not have been overwriting
we could not have been overwriting
you could not have been overwriting
they could not have been overwriting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overwrite?
could you overwrite?
could he overwrite?
could we overwrite?
could you overwrite?
could they overwrite? 	could I be overwriting?
could you be overwriting?
could he be overwriting?
could we be overwriting?
could you be overwriting?
could they be overwriting? 	could I have overwritten?
could you have overwritten?
could he have overwritten?
could we have overwritten?
could you have overwritten?
could they have overwritten? 	could I have been overwriting?
could you have been overwriting?
could he have been overwriting?
could we have been overwriting?
could you have been overwriting?
could they have been overwriting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not overwrite?
could you not overwrite?
could he not overwrite?
could we not overwrite?
could you not overwrite?
could they not overwrite? 	could I not be overwriting?
could you not be overwriting?
could he not be overwriting?
could we not be overwriting?
could you not be overwriting?
could they not be overwriting? 	could I not have overwritten?
could you not have overwritten?
could he not have overwritten?
could we not have overwritten?
could you not have overwritten?
could they not have overwritten? 	could I not have been overwriting?
could you not have been overwriting?
could he not have been overwriting?
could we not have been overwriting?
could you not have been overwriting?
could they not have been overwriting?