could chink
Regular verb: chink - chinked- chinked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could chink
you could chink
she could chink
we could chink
you could chink
they could chink 	I could be chinking
you could be chinking
she could be chinking
we could be chinking
you could be chinking
they could be chinking	I could have chinked
you could have chinked
she could have chinked
we could have chinked
you could have chinked
they could have chinked	I could have been chinking
you could have been chinking
she could have been chinking
we could have been chinking
you could have been chinking
they could have been chinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't chink
you couldn't chink
she couldn't chink
we couldn't chink
you couldn't chink
they couldn't chink 	I couldn't be chinking
you couldn't be chinking
she couldn't be chinking
we couldn't be chinking
you couldn't be chinking
they couldn't be chinking	I couldn't have chinked
you couldn't have chinked
she couldn't have chinked
we couldn't have chinked
you couldn't have chinked
they couldn't have chinked	I couldn't have been chinking
you couldn't have been chinking
she couldn't have been chinking
we couldn't have been chinking
you couldn't have been chinking
they couldn't have been chinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I chink?
could you chink?
could she chink?
could we chink?
could you chink?
could they chink? 	could I be chinking?
could you be chinking?
could she be chinking?
could we be chinking?
could you be chinking?
could they be chinking? 	could I have chinked?
could you have chinked?
could she have chinked?
could we have chinked?
could you have chinked?
could they have chinked? 	could I have been chinking?
could you have been chinking?
could she have been chinking?
could we have been chinking?
could you have been chinking?
could they have been chinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I chink?
couldn't you chink?
couldn't she chink?
couldn't we chink?
couldn't you chink?
couldn't they chink? 	couldn't I be chinking?
couldn't you be chinking?
couldn't she be chinking?
couldn't we be chinking?
couldn't you be chinking?
couldn't they be chinking? 	couldn't I have chinked?
couldn't you have chinked?
couldn't she have chinked?
couldn't we have chinked?
couldn't you have chinked?
couldn't they have chinked? 	couldn't I have been chinking?
couldn't you have been chinking?
couldn't she have been chinking?
couldn't we have been chinking?
couldn't you have been chinking?
couldn't they have been chinking?