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 could not strop
you could not strop
he could not strop
we could not strop
you could not strop
they could not strop 	I could not be stropping
you could not be stropping
he could not be stropping
we could not be stropping
you could not be stropping
they could not be stropping	I could not have stropped
you could not have stropped
he could not have stropped
we could not have stropped
you could not have stropped
they could not have stropped	I could not have been stropping
you could not have been stropping
he could not have been stropping
we could not have been stropping
you could not have been stropping
they could not 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 	
could I not strop?
could you not strop?
could he not strop?
could we not strop?
could you not strop?
could they not strop? 	could I not be stropping?
could you not be stropping?
could he not be stropping?
could we not be stropping?
could you not be stropping?
could they not be stropping? 	could I not have stropped?
could you not have stropped?
could he not have stropped?
could we not have stropped?
could you not have stropped?
could they not have stropped? 	could I not have been stropping?
could you not have been stropping?
could he not have been stropping?
could we not have been stropping?
could you not have been stropping?
could they not have been stropping?