【名校课件】人教版必修4：Unit2Workingtheland（learningaboutlanguage）.ppt

Unit 2 Working the land ;1.Find the word or phrase from the text for each of these meaning.;_______ to send things to foreign countries for sale ___________ pleased by having what one wants or needs _______ to provide with things necessary for a certain purpose _______ plants grown in large amounts by farmers _______ because of ;Answer keys for Ex.2 on Page 11:;Answer keys for Ex.3 on Page 11:;Answer keys for Ex.1 on Page 49;export → export comment → comment focus → focus regret → regret struggle → struggle sum → sum ;Answer keys for Ex.1 on Page 49;Answer keys for Ex.2 on Page 49;Answer keys for Ex.3 on Page 49;5.I think I′m going to use a report about how farmers are keeping their fields free of chemical fertilizers . 6. It took the farmer twenty years to build up his business. 7.Using too much chemical fertilizer will lead to serious problems.;The using of -ing form;The –ing form as the Subject ＆Object;②用形式主语it，把真正的主语——动名词结构移置句尾。但这种句子形式有一定的限制，作表语的只能是某些形容词或少数名词，如useful，useless，good，fun；no use，worth等。如： 和夏洛克争辩是没有什么用的。 It is useless trying to argue with Shylock． 这事值得去做。 It’s worth making the effort． 想再解释一次有好处吗? Is it any good trying to explain? 跟你在一起工作是令人愉快的。 It is pleasant working with you．;③在there be结构中作主语，这种结构的意思相当于“It is impossible to do… ”。 例如： 若要人不知，除非己莫为。 There is no hiding of evil but not to do it． 这种事开不得玩笑。 Here is no joking about such matter. 无法知道他什么时候离开 There was no knowing when he would leave. ;It +be +a waste of time doing 做…是浪费时间的 It is/was no good/use doing 做…是没用处的 It is/was hardly/scarcely worth doing 做…不值得 It is/was worth/worthwhile doing 做…是值得的 There is no doing 无法…， 不允许…;There is no sense in doing 做…没有道理 There is/was no use doing 干…无意义 There is/was nothing worse than doing 没有比…更糟的 There is/was no point doing 干…无意义;注意：There is no need to do sth 干、、、没必要，在此句式中to do 不可换为doing.. 没有必要告诉她。 There is no need to tell her. 提示：当动名词用作主语时，其逻辑主语由形容词性物主代词和名词所有格构成。 我姐姐病了，使我很担心。 My sisters being ill made we worried. 你正确未必就意味着我错了。 Your being