通常不能用that引导的定语从句

通常不能用that引导的定语从句

在下列情况下，通常不用that引导定语从句：

1. 引导非限制性定语从句时：此时不能用that，而要根据情况选用who, whom或which等。如：

Yesterday I met Mary, who seemed very excited. 我昨天碰到了玛丽，她显得很兴奋。

2. 直接在介词后用作宾语时：此时不用that，而要用whom或which。如：

This is the person to whom your father spoke just now. 这是刚才你父亲和他说话的那个人。

3. 当定语从句被分隔时：当先行词与关系代词之间有较复杂的短语或从句隔开时，不宜用that，而用who, whom或which。如：

I was the only person in my office who was invited. 我是我们办公室里唯一受到邀请的人。