English verb conjugation
COULD VOUCHER

Regular verb: voucher - vouchered - vouchered

Affirmation

Simple form	V-ing form
I could voucher you could voucher he could voucher we could voucher you could voucher they could voucher	I could be vouchering you could be vouchering he could be vouchering we could be vouchering you could be vouchering they could be vouchering
Perfect	V-ing perfect
I could have vouchered you could have vouchered he could have vouchered we could have vouchered you could have vouchered they could have vouchered	I could have been vouchering you could have been vouchering he could have been vouchering we could have been vouchering you could have been vouchering they could have been vouchering

Negation

Simple form	V-ing form
I couldn't voucher you couldn't voucher he couldn't voucher we couldn't voucher you couldn't voucher they couldn't voucher	I couldn't be vouchering you couldn't be vouchering he couldn't be vouchering we couldn't be vouchering you couldn't be vouchering they couldn't be vouchering
Perfect	V-ing perfect
I couldn't have vouchered you couldn't have vouchered he couldn't have vouchered we couldn't have vouchered you couldn't have vouchered they couldn't have vouchered	I couldn't have been vouchering you couldn't have been vouchering he couldn't have been vouchering we couldn't have been vouchering you couldn't have been vouchering they couldn't have been vouchering

Interrogative form

Simple form	V-ing form
could I voucher? could you voucher? could he voucher? could we voucher? could you voucher? could they voucher?	could I be vouchering? could you be vouchering? could he be vouchering? could we be vouchering? could you be vouchering? could they be vouchering?
Perfect	V-ing perfect
could I have vouchered? could you have vouchered? could he have vouchered? could we have vouchered? could you have vouchered? could they have vouchered?	could I have been vouchering? could you have been vouchering? could he have been vouchering? could we have been vouchering? could you have been vouchering? could they have been vouchering?

Interro-negative form

Simple form	V-ing form
couldn't I voucher? couldn't you voucher? couldn't he voucher? couldn't we voucher? couldn't you voucher? couldn't they voucher?	couldn't I be vouchering? couldn't you be vouchering? couldn't he be vouchering? couldn't we be vouchering? couldn't you be vouchering? couldn't they be vouchering?
Perfect	V-ing perfect
couldn't I have vouchered? couldn't you have vouchered? couldn't he have vouchered? couldn't we have vouchered? couldn't you have vouchered? couldn't they have vouchered?	couldn't I have been vouchering? couldn't you have been vouchering? couldn't he have been vouchering? couldn't we have been vouchering? couldn't you have been vouchering? couldn't they have been vouchering?