不要誤用which替代強調結構中的that

根據英語強調結構的基本格式it is (was)…that (who)…可知，不管被強調成分為指時間或地點，還是指原因或方式等，其后一律要用that，不可用when, where, why, how等。至于其中的who，它只用于被強調成分指人的場合。如：

他是昨天晚上才第一次親她。

誤：It was last night when he kissed her for the first time.

正：It was last night that he kissed her for the first time.

我昨天是由于想買本字典而進城的。

誤：It was because I wanted to buy a dictionary why I went to town yesterday.

正：It was because I wanted to buy a dictionary that I went to town yesterday.