Translate the following sentences, and tell the functions of it.1.Whos knocking at the door? Its me.2. Look at the poor little baby. It is crying again.3. This is not my book. It is Marys.4. Whose jacket is that? It is mine.5. Its half past five now.6. Its getting colder and colder.7. Is it very far to the post office?8. It was very quiet at the moment.9. How is it getting with you?(person)(person)(object)(pronoun)(time)(weather)(distance)(environment)(situation)10.It was wrong for you not to help her.11.It is no use learning these figures by heart.12.It is quite right that you did that.13.It is not yet known where she has gone.14.It was unknown whether they would be killed or not.15.He felt it his duty to help others.16.We think it important that college students should master at least one foreign language.(代不定式短语作形式主语)(代动名词短语作形式主语)(代名词性从句作形式主语 )(代名词性从句作形式主语)(代名词性从句作形式主语)(代不定式短语作形式宾语)(代名词性从句作形式宾语)Rewrite the following sentences using it. 1.To run business successfully in this area is very difficult.2.Learning English without practice will be useless.3.Whether he can go to a key university or not is unknown.4.That he will get on well with them is certain.5.You may find to clean up the oil on the clothes difficult.It is very difficult to run business successfully in this area.It will be useless learning English without practice.It is unknown whether he can go to a key university or not.It is certain that he will get on well with them.You may find it difficult to clean up the oil on the clothes.Translate the following sentences and tell the functions of it.They met Tom in the street yesterday.(主语)(宾语)(地点状语)(时间状语)(时间状语) 强调句结构：It is/was +被强调部分+that(who)+句子 的其余成分It was they who/that met Tom in the street yesterday.It was Tom that they met in the street yesterday.Was it in the street that they met Tom yesterday?It was yesterday that they met Tom in the street.When was it that they met Tom in the street?用强调结构改写下列句子（强调画线部分）1.I am looking for my English teacher.2.The people in the country are friendly to us.3.Did he find a book under the desk?4.He went to college in 1992.5.He did not go to school yesterday because he was ill.It is my English teacher that I am looking for.It is the people in the country who are friendly to us.Was it a book that he found under the desk?It was in 1992 that he went to college.It was because he was ill that he did not go to school yesterday.6.When he was about to go out, it began to rain.7.I did not realize she was a famous film star until she took off her dark glasses.8.The people in the country are friendly to us.(强调句的特殊 疑问句)9.He went to college in 1992. (强调句的特殊疑问句)10.He did not go to school yesterday because he was ill. (强 调句的特殊疑问句)It was when he was about to go out that it began to rain.It was not until she took off her dark glasses that I realized she was a famous film star.Who is it that are friendly to us?When was it that he went to college?Why was it that he did not go to school yesterday?翻译下列句子，并说出含it的特定句型： 1.It was long before he came back.2.It will be half a year before we leave the school. 句型：It was/will be long +before从句 3.It is/has been two years since his father died.4.It was three days since he had fallen ill.5.It is seven years since I worked in the factory.句型：It is/has been/was +some time+since从句 6.It is the first time that I have visited the school.7.It was the last time that I had apologized to you.句型：It+be+the+序数词+time+that从句8.It was 11:00 when they arrived at the factory.9.It will be July 1 when we meet again.句型：It +be +具体时间+when 从句 10.It is high time that we handed in our homework.11.It is about time that you should learn English.句型：It +be+high/about time+that从句Translate the following sentences:1.再过一周我们就会知道考试成绩了。2.我开始吸烟有三年了。3.我们明年6月份高中毕业。4.该是我们朗读英语的时候了。5.他第三次向老师道歉了。It will be one week before we know the result of the examination.It is three years since I began to smoke.It will be June next year when we finish Senior Middle School.It is high time that we read English aloud.It is high time that we should read English aloud.It was the third time that he had apologized to his teacher.Conclude the functions of it:1.personal pronoun 人称代词2.impersonal pronoun 非人称代词3.form pronoun （形式宾语，形式主语 ）4. emphatic structure 强调句结构5.special patterns 特殊句式