could prewash
Regular verb: prewash - prewashed- prewashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prewash
you could prewash
he could prewash
we could prewash
you could prewash
they could prewash 	I could be prewashing
you could be prewashing
he could be prewashing
we could be prewashing
you could be prewashing
they could be prewashing	I could have prewashed
you could have prewashed
he could have prewashed
we could have prewashed
you could have prewashed
they could have prewashed	I could have been prewashing
you could have been prewashing
he could have been prewashing
we could have been prewashing
you could have been prewashing
they could have been prewashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't prewash
you couldn't prewash
he couldn't prewash
we couldn't prewash
you couldn't prewash
they couldn't prewash 	I couldn't be prewashing
you couldn't be prewashing
he couldn't be prewashing
we couldn't be prewashing
you couldn't be prewashing
they couldn't be prewashing	I couldn't have prewashed
you couldn't have prewashed
he couldn't have prewashed
we couldn't have prewashed
you couldn't have prewashed
they couldn't have prewashed	I couldn't have been prewashing
you couldn't have been prewashing
he couldn't have been prewashing
we couldn't have been prewashing
you couldn't have been prewashing
they couldn't have been prewashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prewash?
could you prewash?
could he prewash?
could we prewash?
could you prewash?
could they prewash? 	could I be prewashing?
could you be prewashing?
could he be prewashing?
could we be prewashing?
could you be prewashing?
could they be prewashing? 	could I have prewashed?
could you have prewashed?
could he have prewashed?
could we have prewashed?
could you have prewashed?
could they have prewashed? 	could I have been prewashing?
could you have been prewashing?
could he have been prewashing?
could we have been prewashing?
could you have been prewashing?
could they have been prewashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I prewash?
couldn't you prewash?
couldn't he prewash?
couldn't we prewash?
couldn't you prewash?
couldn't they prewash? 	couldn't I be prewashing?
couldn't you be prewashing?
couldn't he be prewashing?
couldn't we be prewashing?
couldn't you be prewashing?
couldn't they be prewashing? 	couldn't I have prewashed?
couldn't you have prewashed?
couldn't he have prewashed?
couldn't we have prewashed?
couldn't you have prewashed?
couldn't they have prewashed? 	couldn't I have been prewashing?
couldn't you have been prewashing?
couldn't he have been prewashing?
couldn't we have been prewashing?
couldn't you have been prewashing?
couldn't they have been prewashing?