例句：

　　1、Our son's having problems with his reading and writing.

　　我們兒子在讀寫方面有困難。

　　2、I've never been a great one for writing letters.

　　我向來(lái)不喜歡寫信。

　　3、She hasn't written ─ not that she said she would.

　　她還沒寫信來(lái)——倒不是她說(shuō)過她要寫。

　　4、This expression is used mainly in speech, not in writing.

　　這種表達(dá)主要用于口語(yǔ)，而不是書面語(yǔ)。