could wrack
Regular verb: wrack - wracked- wracked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could wrack
you could wrack
she could wrack
we could wrack
you could wrack
they could wrack 	I could be wracking
you could be wracking
she could be wracking
we could be wracking
you could be wracking
they could be wracking	I could have wracked
you could have wracked
she could have wracked
we could have wracked
you could have wracked
they could have wracked	I could have been wracking
you could have been wracking
she could have been wracking
we could have been wracking
you could have been wracking
they could have been wracking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't wrack
you couldn't wrack
she couldn't wrack
we couldn't wrack
you couldn't wrack
they couldn't wrack 	I couldn't be wracking
you couldn't be wracking
she couldn't be wracking
we couldn't be wracking
you couldn't be wracking
they couldn't be wracking	I couldn't have wracked
you couldn't have wracked
she couldn't have wracked
we couldn't have wracked
you couldn't have wracked
they couldn't have wracked	I couldn't have been wracking
you couldn't have been wracking
she couldn't have been wracking
we couldn't have been wracking
you couldn't have been wracking
they couldn't have been wracking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I wrack?
could you wrack?
could she wrack?
could we wrack?
could you wrack?
could they wrack? 	could I be wracking?
could you be wracking?
could she be wracking?
could we be wracking?
could you be wracking?
could they be wracking? 	could I have wracked?
could you have wracked?
could she have wracked?
could we have wracked?
could you have wracked?
could they have wracked? 	could I have been wracking?
could you have been wracking?
could she have been wracking?
could we have been wracking?
could you have been wracking?
could they have been wracking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I wrack?
couldn't you wrack?
couldn't she wrack?
couldn't we wrack?
couldn't you wrack?
couldn't they wrack? 	couldn't I be wracking?
couldn't you be wracking?
couldn't she be wracking?
couldn't we be wracking?
couldn't you be wracking?
couldn't they be wracking? 	couldn't I have wracked?
couldn't you have wracked?
couldn't she have wracked?
couldn't we have wracked?
couldn't you have wracked?
couldn't they have wracked? 	couldn't I have been wracking?
couldn't you have been wracking?
couldn't she have been wracking?
couldn't we have been wracking?
couldn't you have been wracking?
couldn't they have been wracking?