could grummet
Regular verb: grummet - grummeted- grummeted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could grummet
you could grummet
she could grummet
we could grummet
you could grummet
they could grummet 	I could be grummeting
you could be grummeting
she could be grummeting
we could be grummeting
you could be grummeting
they could be grummeting	I could have grummeted
you could have grummeted
she could have grummeted
we could have grummeted
you could have grummeted
they could have grummeted	I could have been grummeting
you could have been grummeting
she could have been grummeting
we could have been grummeting
you could have been grummeting
they could have been grummeting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not grummet
you could not grummet
she could not grummet
we could not grummet
you could not grummet
they could not grummet 	I could not be grummeting
you could not be grummeting
she could not be grummeting
we could not be grummeting
you could not be grummeting
they could not be grummeting	I could not have grummeted
you could not have grummeted
she could not have grummeted
we could not have grummeted
you could not have grummeted
they could not have grummeted	I could not have been grummeting
you could not have been grummeting
she could not have been grummeting
we could not have been grummeting
you could not have been grummeting
they could not have been grummeting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I grummet?
could you grummet?
could she grummet?
could we grummet?
could you grummet?
could they grummet? 	could I be grummeting?
could you be grummeting?
could she be grummeting?
could we be grummeting?
could you be grummeting?
could they be grummeting? 	could I have grummeted?
could you have grummeted?
could she have grummeted?
could we have grummeted?
could you have grummeted?
could they have grummeted? 	could I have been grummeting?
could you have been grummeting?
could she have been grummeting?
could we have been grummeting?
could you have been grummeting?
could they have been grummeting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not grummet?
could you not grummet?
could she not grummet?
could we not grummet?
could you not grummet?
could they not grummet? 	could I not be grummeting?
could you not be grummeting?
could she not be grummeting?
could we not be grummeting?
could you not be grummeting?
could they not be grummeting? 	could I not have grummeted?
could you not have grummeted?
could she not have grummeted?
could we not have grummeted?
could you not have grummeted?
could they not have grummeted? 	could I not have been grummeting?
could you not have been grummeting?
could she not have been grummeting?
could we not have been grummeting?
could you not have been grummeting?
could they not have been grummeting?