could rankle
Regular verb: rankle - rankled- rankled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could rankle
you could rankle
she could rankle
we could rankle
you could rankle
they could rankle 	I could be rankling
you could be rankling
she could be rankling
we could be rankling
you could be rankling
they could be rankling	I could have rankled
you could have rankled
she could have rankled
we could have rankled
you could have rankled
they could have rankled	I could have been rankling
you could have been rankling
she could have been rankling
we could have been rankling
you could have been rankling
they could have been rankling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't rankle
you couldn't rankle
she couldn't rankle
we couldn't rankle
you couldn't rankle
they couldn't rankle 	I couldn't be rankling
you couldn't be rankling
she couldn't be rankling
we couldn't be rankling
you couldn't be rankling
they couldn't be rankling	I couldn't have rankled
you couldn't have rankled
she couldn't have rankled
we couldn't have rankled
you couldn't have rankled
they couldn't have rankled	I couldn't have been rankling
you couldn't have been rankling
she couldn't have been rankling
we couldn't have been rankling
you couldn't have been rankling
they couldn't have been rankling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I rankle?
could you rankle?
could she rankle?
could we rankle?
could you rankle?
could they rankle? 	could I be rankling?
could you be rankling?
could she be rankling?
could we be rankling?
could you be rankling?
could they be rankling? 	could I have rankled?
could you have rankled?
could she have rankled?
could we have rankled?
could you have rankled?
could they have rankled? 	could I have been rankling?
could you have been rankling?
could she have been rankling?
could we have been rankling?
could you have been rankling?
could they have been rankling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I rankle?
couldn't you rankle?
couldn't she rankle?
couldn't we rankle?
couldn't you rankle?
couldn't they rankle? 	couldn't I be rankling?
couldn't you be rankling?
couldn't she be rankling?
couldn't we be rankling?
couldn't you be rankling?
couldn't they be rankling? 	couldn't I have rankled?
couldn't you have rankled?
couldn't she have rankled?
couldn't we have rankled?
couldn't you have rankled?
couldn't they have rankled? 	couldn't I have been rankling?
couldn't you have been rankling?
couldn't she have been rankling?
couldn't we have been rankling?
couldn't you have been rankling?
couldn't they have been rankling?