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1、That we should improve our oral English is important.,That we should improve our oral English is important. It is important that we should improve our oral English.,Which one is better?,That we should improve our oral English is important. It is important that we should improve our oral English.,pre
2、ferable,Which one is better?,That we should improve our oral English is important. It is important that we should improve our oral English.,preferable,correct,Which one is better?,That we should improve our oral English is important. It is important that we should improve our oral English.,Preparato
3、ry subject “it“,Read the notes on page 30.,Preparatory/ Empty subject “it”:,Preparatory/ Empty subject “it”:,1. We can use it as a preparatory subject,Preparatory/ Empty subject “it”:,1. We can use it as a preparatory subject A. when we use a noun clause as the subject of a sentence.,Preparatory/ Em
4、pty subject “it”:,1. We can use it as a preparatory subject A. when we use a noun clause as the subject of a sentence. a. (preferable) It is certain that we would not be able to understand Old English today. =,Preparatory/ Empty subject “it”:,1. We can use it as a preparatory subject A. when we use
5、a noun clause as the subject of a sentence. a. (preferable) It is certain that we would not be able to understand Old English today. = (correct) That we would not be able to understand Old English today is certain.,b. (preferable) It is easy to answer whether English will continue changing in the fu
6、ture. =,b. (preferable) It is easy to answer whether English will continue changing in the future. = (correct) Whether English will continue changing in the future is easy to answer.,b. (preferable) It is easy to answer whether English will continue changing in the future. = (correct) Whether Englis
7、h will continue changing in the future is easy to answer. c. (preferable) It depends on the style of writing when we use certain words. =,b. (preferable) It is easy to answer whether English will continue changing in the future. = (correct) Whether English will continue changing in the future is eas
8、y to answer. c. (preferable) It depends on the style of writing when we use certain words. = (correct) When we use certain words depends on the style of writing.,B. when the subject is a to-infinitive.,a. (preferable) It is hard to master a foreign language. =,B. when the subject is a to-infinitive.
9、,a. (preferable) It is hard to master a foreign language. = (correct) To master a foreign language is hard.,B. when the subject is a to-infinitive.,a. (preferable) It is hard to master a foreign language. = (correct) To master a foreign language is hard. b. (preferable) It is important to know how t
10、o use a computer. =,B. when the subject is a to-infinitive.,a. (preferable) It is hard to master a foreign language. = (correct) To master a foreign language is hard. b. (preferable) It is important to know how to use a computer. = (correct) To know how to use a computer is important.,B. when the su
11、bject is a to-infinitive.,C. when the subject is a v-ing form.,C. when the subject is a v-ing form. a. ( preferable) Walking in the wood is comfortable . =,C. when the subject is a v-ing form. a. ( preferable) Walking in the wood is comfortable . = (correct) It is comfortable walking in the wood.,C.
12、 when the subject is a v-ing form. a. ( preferable) Walking in the wood is comfortable . = (correct) It is comfortable walking in the wood. b. (preferable) Travelling to Beijing takes up a lot of my time. =,C. when the subject is a v-ing form. a. ( preferable) Walking in the wood is comfortable . =
13、(correct) It is comfortable walking in the wood. b. (preferable) Travelling to Beijing takes up a lot of my time. = (correct) It takes up a lot of my time travelling to Beijing.,Tip,Tip,We usually use the preparatory subject it with a clause or to-infinitive (preferable), but with the v-ing form we
14、prefer the real subject at the beginning.,2. It can also be used before seem, appear, happen, turn out and prove as the preparatory subject of a sentence.,2. It can also be used before seem, appear, happen, turn out and prove as the preparatory subject of a sentence. It seems that he speaks two lang
15、uages. =,2. It can also be used before seem, appear, happen, turn out and prove as the preparatory subject of a sentence. It seems that he speaks two languages. = He seems to speak two languages.,2. It can also be used before seem, appear, happen, turn out and prove as the preparatory subject of a s
16、entence. It seems that he speaks two languages. = He seems to speak two languages. b. It happens that my new neighbour comes from my home town. =,2. It can also be used before seem, appear, happen, turn out and prove as the preparatory subject of a sentence. It seems that he speaks two languages. = He seems to speak two languages. b. It happens that my new neighbour comes from my home town. = My new neighbour happens to come from my home town.,Exercise A (page 31),Exercise A (page 31),2. To know
