could brake
Regular verb: brake - braked- braked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could brake
you could brake
she could brake
we could brake
you could brake
they could brake 	I could be braking
you could be braking
she could be braking
we could be braking
you could be braking
they could be braking	I could have braked
you could have braked
she could have braked
we could have braked
you could have braked
they could have braked	I could have been braking
you could have been braking
she could have been braking
we could have been braking
you could have been braking
they could have been braking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't brake
you couldn't brake
she couldn't brake
we couldn't brake
you couldn't brake
they couldn't brake 	I couldn't be braking
you couldn't be braking
she couldn't be braking
we couldn't be braking
you couldn't be braking
they couldn't be braking	I couldn't have braked
you couldn't have braked
she couldn't have braked
we couldn't have braked
you couldn't have braked
they couldn't have braked	I couldn't have been braking
you couldn't have been braking
she couldn't have been braking
we couldn't have been braking
you couldn't have been braking
they couldn't have been braking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I brake?
could you brake?
could she brake?
could we brake?
could you brake?
could they brake? 	could I be braking?
could you be braking?
could she be braking?
could we be braking?
could you be braking?
could they be braking? 	could I have braked?
could you have braked?
could she have braked?
could we have braked?
could you have braked?
could they have braked? 	could I have been braking?
could you have been braking?
could she have been braking?
could we have been braking?
could you have been braking?
could they have been braking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I brake?
couldn't you brake?
couldn't she brake?
couldn't we brake?
couldn't you brake?
couldn't they brake? 	couldn't I be braking?
couldn't you be braking?
couldn't she be braking?
couldn't we be braking?
couldn't you be braking?
couldn't they be braking? 	couldn't I have braked?
couldn't you have braked?
couldn't she have braked?
couldn't we have braked?
couldn't you have braked?
couldn't they have braked? 	couldn't I have been braking?
couldn't you have been braking?
couldn't she have been braking?
couldn't we have been braking?
couldn't you have been braking?
couldn't they have been braking?