牛津译林版八年级英语下册Unit8 A green world全章学案及练习

牛津译林版八年级英语下册Unit8 A green world全章学案及练习

Comic & Welcome to the unit

【预学热身】

1.过去经常做某事__________________________

2. 乘地铁________________________

3.关灯________________

4. 骑自行车_______________

5. 减少空气污染_____________________

【知识要点】

1.-I like digging in the garden. -Are you serious.

dig vt& vi 挖(洞,沟等)过去式和过去分词是dug,现在分词形式digging

serious adj”认真的,严肃的” 常用短语:be serious about 对...认真;nothing serious 没什么严重的。seriously adv严肃地,认真地;seriousness n.严肃,认真

2.We can reduce air pollution by riding bicycles.

reduce vt”减少,降低(水平,损失,价格等)”,“减轻(症状)”;

反义词increase 增加;reduction n 减少;缩减

例如:the jackets have been reduced by 10% 夹克打九折

By 1995 this figure has reduced (from 5%) to under 4%

【词义辨析】

reduce to 降低到.....减少到.... 例如:the number of students reduce to 30.; reduce by 降低了....减少了... 例如:the number of students reduce by 30.

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