could plunk
Regular verb: plunk - plunked- plunked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could plunk
you could plunk
she could plunk
we could plunk
you could plunk
they could plunk 	I could be plunking
you could be plunking
she could be plunking
we could be plunking
you could be plunking
they could be plunking	I could have plunked
you could have plunked
she could have plunked
we could have plunked
you could have plunked
they could have plunked	I could have been plunking
you could have been plunking
she could have been plunking
we could have been plunking
you could have been plunking
they could have been plunking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't plunk
you couldn't plunk
she couldn't plunk
we couldn't plunk
you couldn't plunk
they couldn't plunk 	I couldn't be plunking
you couldn't be plunking
she couldn't be plunking
we couldn't be plunking
you couldn't be plunking
they couldn't be plunking	I couldn't have plunked
you couldn't have plunked
she couldn't have plunked
we couldn't have plunked
you couldn't have plunked
they couldn't have plunked	I couldn't have been plunking
you couldn't have been plunking
she couldn't have been plunking
we couldn't have been plunking
you couldn't have been plunking
they couldn't have been plunking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I plunk?
could you plunk?
could she plunk?
could we plunk?
could you plunk?
could they plunk? 	could I be plunking?
could you be plunking?
could she be plunking?
could we be plunking?
could you be plunking?
could they be plunking? 	could I have plunked?
could you have plunked?
could she have plunked?
could we have plunked?
could you have plunked?
could they have plunked? 	could I have been plunking?
could you have been plunking?
could she have been plunking?
could we have been plunking?
could you have been plunking?
could they have been plunking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I plunk?
couldn't you plunk?
couldn't she plunk?
couldn't we plunk?
couldn't you plunk?
couldn't they plunk? 	couldn't I be plunking?
couldn't you be plunking?
couldn't she be plunking?
couldn't we be plunking?
couldn't you be plunking?
couldn't they be plunking? 	couldn't I have plunked?
couldn't you have plunked?
couldn't she have plunked?
couldn't we have plunked?
couldn't you have plunked?
couldn't they have plunked? 	couldn't I have been plunking?
couldn't you have been plunking?
couldn't she have been plunking?
couldn't we have been plunking?
couldn't you have been plunking?
couldn't they have been plunking?