could tangle
Regular verb: tangle - tangled- tangled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tangle
you could tangle
she could tangle
we could tangle
you could tangle
they could tangle 	I could be tangling
you could be tangling
she could be tangling
we could be tangling
you could be tangling
they could be tangling	I could have tangled
you could have tangled
she 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
she 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
she 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
she 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
she 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
she 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 she tangle?
could we tangle?
could you tangle?
could they tangle? 	could I be tangling?
could you be tangling?
could she be tangling?
could we be tangling?
could you be tangling?
could they be tangling? 	could I have tangled?
could you have tangled?
could she 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 she 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 she 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 she 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 she 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 she have been tangling?
couldn't we have been tangling?
couldn't you have been tangling?
couldn't they have been tangling?