I could road-tesl you could road-tesl he could road-tesl we could road-tesl you could road-tesl they could road-tesl
V-ing form
I could be road-tesling you could be road-tesling he could be road-tesling we could be road-tesling you could be road-tesling they could be road-tesling
Perfect
I could have road-tesled you could have road-tesled he could have road-tesled we could have road-tesled you could have road-tesled they could have road-tesled
V-ing perfect
I could have been road-tesling you could have been road-tesling he could have been road-tesling we could have been road-tesling you could have been road-tesling they could have been road-tesling
Negation
Simple form
I could not road-tesl you could not road-tesl he could not road-tesl we could not road-tesl you could not road-tesl they could not road-tesl
V-ing form
I could not be road-tesling you could not be road-tesling he could not be road-tesling we could not be road-tesling you could not be road-tesling they could not be road-tesling
Perfect
I could not have road-tesled you could not have road-tesled he could not have road-tesled we could not have road-tesled you could not have road-tesled they could not have road-tesled
V-ing perfect
I could not have been road-tesling you could not have been road-tesling he could not have been road-tesling we could not have been road-tesling you could not have been road-tesling they could not have been road-tesling
Interrogative form
Simple form
could I road-tesl? could you road-tesl? could he road-tesl? could we road-tesl? could you road-tesl? could they road-tesl?
V-ing form
could I be road-tesling? could you be road-tesling? could he be road-tesling? could we be road-tesling? could you be road-tesling? could they be road-tesling?
Perfect
could I have road-tesled? could you have road-tesled? could he have road-tesled? could we have road-tesled? could you have road-tesled? could they have road-tesled?
V-ing perfect
could I have been road-tesling? could you have been road-tesling? could he have been road-tesling? could we have been road-tesling? could you have been road-tesling? could they have been road-tesling?
Interro-negative form
Simple form
could I not road-tesl? could you not road-tesl? could he not road-tesl? could we not road-tesl? could you not road-tesl? could they not road-tesl?
V-ing form
could I not be road-tesling? could you not be road-tesling? could he not be road-tesling? could we not be road-tesling? could you not be road-tesling? could they not be road-tesling?
Perfect
could I not have road-tesled? could you not have road-tesled? could he not have road-tesled? could we not have road-tesled? could you not have road-tesled? could they not have road-tesled?
V-ing perfect
could I not have been road-tesling? could you not have been road-tesling? could he not have been road-tesling? could we not have been road-tesling? could you not have been road-tesling? could they not have been road-tesling?