高一英语新人教版必修4精品课件unit2sectionusinglanguage..ppt

Section Ⅲ Using Language; Recently, however, scientists have been finding that long-term use of these fertilizers can cause damage to the land;1．cause damage to 对……有损害 典例 Smoking can cause damage to our health. 吸烟会损害我们的健康。 拓展 do damage to/do harm to 伤害；损害 运用 完成句子 ①Typhoons sometimes __________________ (对 …… 造成很;These chemicals in the food supply build up in peoples; 拓展 (1) build up 常指建造较大的物体。 (2) put up 着重指建造、搭起一个具有高度的具体的物体。 (3) set up 常和表示组织、机构、团体等意义的名词连用， 与 found 的意义基本相同，但 found 更着重打基础。 运用 完成句子 ①All the pressure ________________ ( 逐 渐 加 大 ), and he was off work for weeks. ②They ________________ (搭起) a tent near the fire. ③They have ________________ (建立) a school for the blind.; Many of these chemicals can lead to cancer or other illnesses.这里面很多化学物质会导致癌症或其他疾病。 3．lead to 导致；造成(后果)；通往，通向;运用 完成句子;They focus on keeping their soil rich and free of di-sease.; 拓展 focus on 集中(注意力、精力等)于 运用 完成句子 ① He was __________________ (……的焦点) everyones attention. ②She tried to __________________ (集中思想于) her work.; 5．keep...free from/of 使……免受(影响、伤害等)；使…… 不含(有害物) 典例 We should keep this village free from/of pollution. 我们要使这个村庄免受污染的影响。 拓展 keep sb.from doing sth.阻止某人做某事 prevent/stop sb.(from) doing sth.阻止某人做某事;Swap summaries with your partner and give each other;拓展 make comments on/upon 评论…… comment on/upon 评论…… No comment.无可奉告。 运用 完成句子;本课时单词; 运用 用所给单词的适当形式填空 1 ．The plane ____________ speed as it was approaching the airport.(reduction) 2 ． This area ranks first in the whole country for cotton ____________.(produce) 3 ． The ____________ of oil under the sea makes the small country rich.(discover) 4．We will do a _________ experiment this Friday.(chemical)