The teacher said, "How many books have you read?"

[Tait-ka]

1. The teacher said to me, "How many books have you read?"
2. The teacher said, "How many books have you read?"
3. The teacher asked me, "How many books have you read?"
4. The teacher asked, "How many books have you read?"

Which of the above direct speech sentence is correct?

A. The teacher asked me how many books I had read.
B. The teacher asked how many books I had read.

Which of the above reported speech sentence is correct?

Source: I created them.

 

[emsr2d2]

A is the correct form of sentences 1 and 3.
Sentences 2 and 4 don't say she was speaking to you so neither A nor B works. The teacher could have been speaking to anyone.
B could be used whether the teacher was speaking to you or to someone else, as long as they were asking the listener how many books you had read.