Could anyone please tell me if my sentence is correct? Thanks.
SENTENCE:

He [WAS DRIVING] at high speed when the brakes of his car [FAILED]. If he [HAD NOT BEEN DRIVING] at high speed, he [WOULD HAVE SURVIVED] even though he [CRASHED] into the other car.

QUESTION:

Are the tenses in capital letters correct? Is my sentence grammatically correct?

Question

Could anyone please tell me if my sentence is correct? Thanks.
SENTENCE:

He [WAS DRIVING] at high speed when the brakes of his car [FAILED]. If he [HAD NOT BEEN DRIVING] at high speed, he [WOULD HAVE SURVIVED] even though he [CRASHED] into the other car.

QUESTION:

Are the tenses in capital letters correct? Is my sentence grammatically correct?

Answer

*at a high speed
** at a high speed
Other than that, everything else is correct!

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