could flop
Regular verb: flop - flopped- flopped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could flop
you could flop
he could flop
we could flop
you could flop
they could flop 	I could be flopping
you could be flopping
he could be flopping
we could be flopping
you could be flopping
they could be flopping	I could have flopped
you could have flopped
he could have flopped
we could have flopped
you could have flopped
they could have flopped	I could have been flopping
you could have been flopping
he could have been flopping
we could have been flopping
you could have been flopping
they could have been flopping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't flop
you couldn't flop
he couldn't flop
we couldn't flop
you couldn't flop
they couldn't flop 	I couldn't be flopping
you couldn't be flopping
he couldn't be flopping
we couldn't be flopping
you couldn't be flopping
they couldn't be flopping	I couldn't have flopped
you couldn't have flopped
he couldn't have flopped
we couldn't have flopped
you couldn't have flopped
they couldn't have flopped	I couldn't have been flopping
you couldn't have been flopping
he couldn't have been flopping
we couldn't have been flopping
you couldn't have been flopping
they couldn't have been flopping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I flop?
could you flop?
could he flop?
could we flop?
could you flop?
could they flop? 	could I be flopping?
could you be flopping?
could he be flopping?
could we be flopping?
could you be flopping?
could they be flopping? 	could I have flopped?
could you have flopped?
could he have flopped?
could we have flopped?
could you have flopped?
could they have flopped? 	could I have been flopping?
could you have been flopping?
could he have been flopping?
could we have been flopping?
could you have been flopping?
could they have been flopping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I flop?
couldn't you flop?
couldn't he flop?
couldn't we flop?
couldn't you flop?
couldn't they flop? 	couldn't I be flopping?
couldn't you be flopping?
couldn't he be flopping?
couldn't we be flopping?
couldn't you be flopping?
couldn't they be flopping? 	couldn't I have flopped?
couldn't you have flopped?
couldn't he have flopped?
couldn't we have flopped?
couldn't you have flopped?
couldn't they have flopped? 	couldn't I have been flopping?
couldn't you have been flopping?
couldn't he have been flopping?
couldn't we have been flopping?
couldn't you have been flopping?
couldn't they have been flopping?