1、强调句与从句的比较1. 强调句与定语从句的比较【1】强调句中的It没有实际意义，it is/ wasthat可被省略；而定语从句中的It可以作主语或宾语等成份，It be与that不可同时省略；【2】强调句将句子中的that不能省略，也不能换成which；而that引起定语从句，that作宾语时可被省略，并且当先行词是事物时可用which代替。【3】运用定语从句时，先行词如果是时间、地点名词，定语从句引导词引导词可用that/ which或者 when/ where。如：比较： (1)A:It was a film (that) I saw at home with my father las
2、t night.(本句是对What is that?问句的回答，来说明“昨晚我和父亲在家看的什么”that所引导的是定语从句，that可被省略)B: It was the film (that) I saw at home with my father last night. 昨晚我和父亲看的就是这部电影。(本句相当于对I saw the film at home with my father last night中a film进行强调)(2)A:It was the room where we used to live. 它是我们过去住过的房子。(where 所引导的从句对前面的room进行
3、说明，它是定语从句)B：It was in the room that we used to live. 过去我们就是住在这间房子里。(in the room是被强调的部分，本句是强调句型)判断：It is a day when the people celebrate their victory. 这是人们庆祝他们的胜利的日子。(when所引导的从句对a day进行说明，是定语从句)It was on the day that people celebrated their victory. 就在那一天，人们庆祝了他们的胜利。(强调on October 1, 1949)2强调句与状语从句的比
4、较【1】状语从句中的It本身就是句子的成份；而强调句首的It不作任何成分也没有实际意义。【2】状语从句的连接词that及句子前面的It be不能去掉。【3】状语从句的引导词可以是when / where，而强调句型中的that不能用其他词代替。比较： (1)A: Its such a good chance that we must grasp it.这是如此好的一个机会，我们必须抓住。结果状语从句B: Its such a good chance that we must grasp.我们必须抓住的的就是如此好的一个机会。强调宾语判断：It was at 7:00 pm that I arr
5、ived at the country. (强调句型，强调时间状语at 7:00) 正是在7:00时， 我到了。 It was 7:00 pm when I arrived at the country. (时间状语从句，在7:00前无介词at) 当我到达时， 时间是7:00。 3. 强调句与主语从句的比较强调句将句子中的it is/ wasthat同时省去，句子仍然成立；而主语从句中it一般作为形式主语，that作为连词，它引起真正的主语从句。比较：(1)A:It is in America that Li Leis father will work. 李蕾的父亲的工作将就在美国。本句若将I
6、t is 及 that同时省去为：in America Li Leis father will work. 句子同样成立，因此前面的句子是强调句型。B:It is obvious that we can not finish the task on time.很明显我们不能按时完成任务了。本句若将It is 及 that同时省去为：obvious we can not finish the task on time. 显然句子错误，因此，前面句子不是强调句型，而是主语从句。判断：It is known to all that China is a country with a long history. (主语从句)众所周知，中国是一个历史悠久的国家。It was here that he fell off his bicycle. (强调句)这正是他从自行车上摔下来的地方。
