2．使用时要特别注意其特性
(1)and, not only ... but (also) ..., neither ... nor ... 等词连接的并列句，在意义上主要对前一句子作补充或引申。
①One day, I was late, and my teacher was angry.
有一天我迟到了，我的老师生气了。
②Not only is he himself interested in the subject, but also his students begin to show interest in it.
不仅他自己对这个科目感兴趣，他的学生也开始表现出兴趣。
(2)or, either ... or ... 连接并列句表示选择意义。
③The children can go with us, or they can stay in. (选择)
孩子们可以跟我们一起去，也可以留下。
④The workers were cheerful, or at least they appeared to be cheerful. (换个说法)
工人们非常高兴，或者说他们至少表现得很高兴。
⑤Be careful, or you will break your neck. (否定条件)
小心点，否则你会折断脖子的。
