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1、Unit 4Oxford EnglishModule 2 Environmental problemsPeriod 5Grammar Grammar Natural disastersHelp protect the environment _ KevinShare your notice. 1Show time2Grammar Using it as the empty subjectWe can use We can use it it as the as the empty subject empty subject like this:like this:It is one ocloc
2、k.It is one oclock.It is summer now. It is summer now. It rained all day.It rained all day.It is only a five-minute walk from my home to the school. It is only a five-minute walk from my home to the school. The timeThe timeThe seasonThe seasonThe weatherThe weatherThe distanceThe distanceIt is hot i
3、n this room. It is hot in this room. The temperatureThe temperaturetimeseason weatherA Answer these questions using it as the subject.B Put the words in the correct order to make meaningful sentences.It is time for supper now.It is autumn in Australia now.It is about five kilometres to the park.It w
4、as windy yesterday.3We can also use We can also use it it as the as the empty subject empty subject of a sentence of a sentence to replace to replace a a toto- -infinitiveinfinitive. . It is not easy for him to learn English well. It is very hard to study two languages. It is important to find out t
5、he truth.Rewrite the sentences below using it as the empty subject.C Write a sentence using it and a to-infinitive under each picture below.It is important to stay calm when there is a fire.It is dangerous to start a fire in the forest.C Write a sentence using it and a to-infinitive under each pictu
6、re below.It is a good idea to take an umbrella.It is nice to have a picnic in the park.4We can also use We can also use it it as the as the empty subject empty subject in the in the following sentence following sentence pattern: pattern: It It seems/appears that seems/appears that Itseemsthatitisgoi
7、ngtorain.Itappearsthathismotherknowsthetruth.Translate the following Chinese sentences into English.It seems/appears that your father doesnt understand you.It seemed/appeared that nobody believed Kevin.It seems/appears that Jim doesnt like me.D Put the words in brackets in the correct order to compl
8、ete the conversations.It seems that a typhoon is coming.It appears that the flight has been cancelled.It seems that something bad has happened to her.HHomework 1. 用it作形式主语，改写下列句子。 To have a good knowledge of history is very helpful for all of us. To learn a foreign language is very useful for a scie
9、ntist. To finish this work in three hours is necessary. To sit by the fire with a book in winter is very comfortable. To guess where they are is difficult for me. To see you staying in bed all the time makes me feel sad. 2. 完成下列汉译英的练习。 他来到饭店的时候，已经是12点50分了。 照顾孤儿是他的职责。 修车花了我一百美元。 看样子她得了重感冒。3. 以小组为单位，分工搜集某一种自然灾害的相关信息，为完成下 节课的课题任务作准备。4. 完成练习册第51至 53 页Grammar的练习。
