八英冀教版课件光盘教学课件unit 7 lesson 38.ppt

(2)表示“……中的几分之几”,一般用 “分数+ of +名词”这一结构。 Only three tenths of people agree with you. 只有十分之三的人同意你的观点。 (3)当分数作主语时,谓语动词的单复数形式由后面所接名词的形式来确定。若后面的名词是可数名词复数时,谓语动词用复数形式,若后面的名词是可数名词的单数或者不可数名词时,谓语动词则要用单数形式。 Two fifths of the students are from China. 五分之二的学生来自于中国。 Three fourths of money is for education. 四分之三的钱用于教育。 　3.Antarctica is covered with snow and ice all year round. be covered with 意思是“被……覆盖”,是被动语态,它的主动形式是“cover…with…”,意思是“用……覆盖……”。被动语态的基本结构为“be动词+ 及物动词的过去分词”。 In winter,everything is covered with snow. 在冬天,一切都被雪覆盖了。 The farmer covers the vegetables with some plastic in cold weather.在寒冷的天气里,农民用塑料布盖上蔬菜。 All her homework was done in time. 她的所有作业及时做完了。 【拓展】　cover作动词时,还可以表示“占地”。 Our school covers 0.5 square miles. 我们学校占地0.5平方英里。 4.The earth is our home now,and it will be our home in the future. 句中future作名词,意思是“将来”,构成短语in the future,意思是“在将来”。 Children are studying for the future. 孩子们正为了将来在学习。 Our dreams will come true in the future.我们的梦想在将来一定能实现。 【辨析】　in the future,in future (1)in the future意思是“在将来”,多指长时间以后的未来。 I believe you can become a policeman in the future.我相信你将来能够成为一名警察。 (2)in future意思是“今后”,一般指从现在开始的以后,相当于from now on。 You must finish your homework by yourself in future.今后你一定要自己完成作业。 【拓展】　future 还可以作形容词,表示“将来的”。 Our future life will be better and better. 我们未来的生活将会越来越好。 1. Its said that____ of the water around the world____ polluted. A. two third, has B.two thirds, have C. two third, are D. two thirds, is Practice 2. The fire last night destroyed many buildings. ____, no one was killed. A. Actually B. Simply C. Luckily D. Immediately 3.Air must ____ fresh all the time. Its good for our health. A. keep B. is keot C. be kept D. keep Read the lesson and match each paragraph with its main idea. Paragraph 1 a.Six of the seven continents are good for people to live on. Paragraph 2 b.We should treat the earth well. Paragraph 3 c.An increasing population is a big problem for the earth. Paragraph 4 d.Two thirds of the earth