could pre-empt
Regular verb: pre-empt - pre-empted- pre-empted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pre-empt
you could pre-empt
she could pre-empt
we could pre-empt
you could pre-empt
they could pre-empt 	I could be pre-empting
you could be pre-empting
she could be pre-empting
we could be pre-empting
you could be pre-empting
they could be pre-empting	I could have pre-empted
you could have pre-empted
she could have pre-empted
we could have pre-empted
you could have pre-empted
they could have pre-empted	I could have been pre-empting
you could have been pre-empting
she could have been pre-empting
we could have been pre-empting
you could have been pre-empting
they could have been pre-empting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not pre-empt
you could not pre-empt
she could not pre-empt
we could not pre-empt
you could not pre-empt
they could not pre-empt 	I could not be pre-empting
you could not be pre-empting
she could not be pre-empting
we could not be pre-empting
you could not be pre-empting
they could not be pre-empting	I could not have pre-empted
you could not have pre-empted
she could not have pre-empted
we could not have pre-empted
you could not have pre-empted
they could not have pre-empted	I could not have been pre-empting
you could not have been pre-empting
she could not have been pre-empting
we could not have been pre-empting
you could not have been pre-empting
they could not have been pre-empting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pre-empt?
could you pre-empt?
could she pre-empt?
could we pre-empt?
could you pre-empt?
could they pre-empt? 	could I be pre-empting?
could you be pre-empting?
could she be pre-empting?
could we be pre-empting?
could you be pre-empting?
could they be pre-empting? 	could I have pre-empted?
could you have pre-empted?
could she have pre-empted?
could we have pre-empted?
could you have pre-empted?
could they have pre-empted? 	could I have been pre-empting?
could you have been pre-empting?
could she have been pre-empting?
could we have been pre-empting?
could you have been pre-empting?
could they have been pre-empting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not pre-empt?
could you not pre-empt?
could she not pre-empt?
could we not pre-empt?
could you not pre-empt?
could they not pre-empt? 	could I not be pre-empting?
could you not be pre-empting?
could she not be pre-empting?
could we not be pre-empting?
could you not be pre-empting?
could they not be pre-empting? 	could I not have pre-empted?
could you not have pre-empted?
could she not have pre-empted?
could we not have pre-empted?
could you not have pre-empted?
could they not have pre-empted? 	could I not have been pre-empting?
could you not have been pre-empting?
could she not have been pre-empting?
could we not have been pre-empting?
could you not have been pre-empting?
could they not have been pre-empting?