could kosher
Regular verb: kosher - koshered- koshered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could kosher
you could kosher
she could kosher
we could kosher
you could kosher
they could kosher 	I could be koshering
you could be koshering
she could be koshering
we could be koshering
you could be koshering
they could be koshering	I could have koshered
you could have koshered
she could have koshered
we could have koshered
you could have koshered
they could have koshered	I could have been koshering
you could have been koshering
she could have been koshering
we could have been koshering
you could have been koshering
they could have been koshering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't kosher
you couldn't kosher
she couldn't kosher
we couldn't kosher
you couldn't kosher
they couldn't kosher 	I couldn't be koshering
you couldn't be koshering
she couldn't be koshering
we couldn't be koshering
you couldn't be koshering
they couldn't be koshering	I couldn't have koshered
you couldn't have koshered
she couldn't have koshered
we couldn't have koshered
you couldn't have koshered
they couldn't have koshered	I couldn't have been koshering
you couldn't have been koshering
she couldn't have been koshering
we couldn't have been koshering
you couldn't have been koshering
they couldn't have been koshering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I kosher?
could you kosher?
could she kosher?
could we kosher?
could you kosher?
could they kosher? 	could I be koshering?
could you be koshering?
could she be koshering?
could we be koshering?
could you be koshering?
could they be koshering? 	could I have koshered?
could you have koshered?
could she have koshered?
could we have koshered?
could you have koshered?
could they have koshered? 	could I have been koshering?
could you have been koshering?
could she have been koshering?
could we have been koshering?
could you have been koshering?
could they have been koshering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I kosher?
couldn't you kosher?
couldn't she kosher?
couldn't we kosher?
couldn't you kosher?
couldn't they kosher? 	couldn't I be koshering?
couldn't you be koshering?
couldn't she be koshering?
couldn't we be koshering?
couldn't you be koshering?
couldn't they be koshering? 	couldn't I have koshered?
couldn't you have koshered?
couldn't she have koshered?
couldn't we have koshered?
couldn't you have koshered?
couldn't they have koshered? 	couldn't I have been koshering?
couldn't you have been koshering?
couldn't she have been koshering?
couldn't we have been koshering?
couldn't you have been koshering?
couldn't they have been koshering?