could burnish
Regular verb: burnish - burnished- burnished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could burnish
you could burnish
he could burnish
we could burnish
you could burnish
they could burnish 	I could be burnishing
you could be burnishing
he could be burnishing
we could be burnishing
you could be burnishing
they could be burnishing	I could have burnished
you could have burnished
he could have burnished
we could have burnished
you could have burnished
they could have burnished	I could have been burnishing
you could have been burnishing
he could have been burnishing
we could have been burnishing
you could have been burnishing
they could have been burnishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't burnish
you couldn't burnish
he couldn't burnish
we couldn't burnish
you couldn't burnish
they couldn't burnish 	I couldn't be burnishing
you couldn't be burnishing
he couldn't be burnishing
we couldn't be burnishing
you couldn't be burnishing
they couldn't be burnishing	I couldn't have burnished
you couldn't have burnished
he couldn't have burnished
we couldn't have burnished
you couldn't have burnished
they couldn't have burnished	I couldn't have been burnishing
you couldn't have been burnishing
he couldn't have been burnishing
we couldn't have been burnishing
you couldn't have been burnishing
they couldn't have been burnishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I burnish?
could you burnish?
could he burnish?
could we burnish?
could you burnish?
could they burnish? 	could I be burnishing?
could you be burnishing?
could he be burnishing?
could we be burnishing?
could you be burnishing?
could they be burnishing? 	could I have burnished?
could you have burnished?
could he have burnished?
could we have burnished?
could you have burnished?
could they have burnished? 	could I have been burnishing?
could you have been burnishing?
could he have been burnishing?
could we have been burnishing?
could you have been burnishing?
could they have been burnishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I burnish?
couldn't you burnish?
couldn't he burnish?
couldn't we burnish?
couldn't you burnish?
couldn't they burnish? 	couldn't I be burnishing?
couldn't you be burnishing?
couldn't he be burnishing?
couldn't we be burnishing?
couldn't you be burnishing?
couldn't they be burnishing? 	couldn't I have burnished?
couldn't you have burnished?
couldn't he have burnished?
couldn't we have burnished?
couldn't you have burnished?
couldn't they have burnished? 	couldn't I have been burnishing?
couldn't you have been burnishing?
couldn't he have been burnishing?
couldn't we have been burnishing?
couldn't you have been burnishing?
couldn't they have been burnishing?