他经常给我写信.
He often writes to me.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他经常给我写信。
He writes to me often.
youdao
他天天给我写信，但我并不经常回信。
He writes me a letter every day, but I don't write back very often.
自从我病愈以来，他经常给我写信。
He has written to me frequently since I was ill.
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