英语中表示强调的结构是 “ It is (was) + 被强调的部分＋that (who)+句子的其它部分，除了谓语部分外，其余的可以用于强调句。需要注意的是当强调的部分是时间状语或地点状语时，只能用that而不用when 或where； 当被强调的部分是人时，可以用who； 当强调主语时要注意主语和谓语的一致。

　　It is my uncle that/who is coming to visit us.

　　It was at midnight that he came back home.

　　It was in the park that the two old friends ran into each other.

　　 It’s not you who are in trouble; but it’s I who am in trouble.

　　 It was not until the accident happened that I became aware of my own foolishness

　　 直到事故发生了我才意识到自己的愚蠢。

　　考点一：平行结构。基本要求是同等重要的或并列的句子成分要用同类的语法形式来表示，不能一会是不定式，一会是动名词。当使用并列连词，尤其是用and, but, both…and, neither…nor…， either…or…， not only…but also…， than等并列连词时，要注意使用平行结构。

　　I value a friend who is sweet, kind, and loving.

　　To know what is good and to do what is right is not the same thing.

　　He is well ?known not only in China but also in many other countries.

　　It is easier to spend money than to maoke money.

　　考点二：情态动词＋完成式 表示对过去的推测。注意肯定和否定的不同含义。

　　 The money has disappeared. Who could have taken it? 钱没了，会是谁拿了 ？

　　 You screamed in your sleep last night. You must hve had a terrible dream.

　　 你昨天晚上睡觉大喊大叫，你一定是在做恶梦。

　　 You should have phoned me last night.

　　你昨晚应该给我打个电话。(实际没有打。含有责备之意)

　　 She sholdn’t have eaten those mushrooms yesterday. Mushrooms don’t agree with you.

　　 她昨天本来不应该吃那些蘑菇，她不能吃蘑菇。