The noise of traffic kept me awake.

I was kept awake by the noise of the traffic

The traffic kept me awake by noise

I kept myself awake due to the noise of the traffic

I remained awake by the noise of the traffic

All of the above

This is a sentence of past indefinite tense.

Active Voice= Subject + Second Form of Verb + Object.

Passive Voice = Object + was/were + third of verb + by + subject.

A.V :The noise of the traffic kept me awake means

ٹریفک کے شور نے مجھے جگائے رکھا۔

Correct P.V: I was kept awake by the noise of the traffic.

Keep is an irregular verb which means رکھنا

Kept is the second form of Keep.

Kept is the third of Keep.