could tangle
Regular verb: tangle - tangled- tangled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tangle
you could tangle
he could tangle
we could tangle
you could tangle
they could tangle 	I could be tangling
you could be tangling
he could be tangling
we could be tangling
you could be tangling
they could be tangling	I could have tangled
you could have tangled
he could have tangled
we could have tangled
you could have tangled
they could have tangled	I could have been tangling
you could have been tangling
he could have been tangling
we could have been tangling
you could have been tangling
they could have been tangling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tangle
you couldn't tangle
he couldn't tangle
we couldn't tangle
you couldn't tangle
they couldn't tangle 	I couldn't be tangling
you couldn't be tangling
he couldn't be tangling
we couldn't be tangling
you couldn't be tangling
they couldn't be tangling	I couldn't have tangled
you couldn't have tangled
he couldn't have tangled
we couldn't have tangled
you couldn't have tangled
they couldn't have tangled	I couldn't have been tangling
you couldn't have been tangling
he couldn't have been tangling
we couldn't have been tangling
you couldn't have been tangling
they couldn't have been tangling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tangle?
could you tangle?
could he tangle?
could we tangle?
could you tangle?
could they tangle? 	could I be tangling?
could you be tangling?
could he be tangling?
could we be tangling?
could you be tangling?
could they be tangling? 	could I have tangled?
could you have tangled?
could he have tangled?
could we have tangled?
could you have tangled?
could they have tangled? 	could I have been tangling?
could you have been tangling?
could he have been tangling?
could we have been tangling?
could you have been tangling?
could they have been tangling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tangle?
couldn't you tangle?
couldn't he tangle?
couldn't we tangle?
couldn't you tangle?
couldn't they tangle? 	couldn't I be tangling?
couldn't you be tangling?
couldn't he be tangling?
couldn't we be tangling?
couldn't you be tangling?
couldn't they be tangling? 	couldn't I have tangled?
couldn't you have tangled?
couldn't he have tangled?
couldn't we have tangled?
couldn't you have tangled?
couldn't they have tangled? 	couldn't I have been tangling?
couldn't you have been tangling?
couldn't he have been tangling?
couldn't we have been tangling?
couldn't you have been tangling?
couldn't they have been tangling?