While you were writing letters, I was reading a book.
你写信的时候，我在看书。
While I am reading《Pride and Prejudice》, he is writing.
我在读《傲慢与偏见》的时候，他在写作。
While he was reading, I was writing.
他在读书，我在写字。
While I was waiting for them, I spent my time reading and writing.
我用阅读和写东西来消磨等待他们的时间。
I'm reading, while he's writing.
我在读书而他在写字。
While you were writing letters, I was reading a book.
你写信时我在看书。 你写信时我在看书。
I was reading while she was writing.
我在读书，她在写字。
While he was writing, I was reading.
他写字时，我在看书。
While he was writing, I was reading.
他写字时，我在看书。
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