could strop
Regular verb: strop - stropped- stropped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could strop
you could strop
he could strop
we could strop
you could strop
they could strop 	I could be stropping
you could be stropping
he could be stropping
we could be stropping
you could be stropping
they could be stropping	I could have stropped
you could have stropped
he could have stropped
we could have stropped
you could have stropped
they could have stropped	I could have been stropping
you could have been stropping
he could have been stropping
we could have been stropping
you could have been stropping
they could have been stropping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't strop
you couldn't strop
he couldn't strop
we couldn't strop
you couldn't strop
they couldn't strop 	I couldn't be stropping
you couldn't be stropping
he couldn't be stropping
we couldn't be stropping
you couldn't be stropping
they couldn't be stropping	I couldn't have stropped
you couldn't have stropped
he couldn't have stropped
we couldn't have stropped
you couldn't have stropped
they couldn't have stropped	I couldn't have been stropping
you couldn't have been stropping
he couldn't have been stropping
we couldn't have been stropping
you couldn't have been stropping
they couldn't have been stropping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I strop?
could you strop?
could he strop?
could we strop?
could you strop?
could they strop? 	could I be stropping?
could you be stropping?
could he be stropping?
could we be stropping?
could you be stropping?
could they be stropping? 	could I have stropped?
could you have stropped?
could he have stropped?
could we have stropped?
could you have stropped?
could they have stropped? 	could I have been stropping?
could you have been stropping?
could he have been stropping?
could we have been stropping?
could you have been stropping?
could they have been stropping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I strop?
couldn't you strop?
couldn't he strop?
couldn't we strop?
couldn't you strop?
couldn't they strop? 	couldn't I be stropping?
couldn't you be stropping?
couldn't he be stropping?
couldn't we be stropping?
couldn't you be stropping?
couldn't they be stropping? 	couldn't I have stropped?
couldn't you have stropped?
couldn't he have stropped?
couldn't we have stropped?
couldn't you have stropped?
couldn't they have stropped? 	couldn't I have been stropping?
couldn't you have been stropping?
couldn't he have been stropping?
couldn't we have been stropping?
couldn't you have been stropping?
couldn't they have been stropping?