外研版高中英语必修二《On the road》SectionA PPT课件，共85页。
语言知识讲练
高 频 词 语
1. on one’s own独立地；单独地
【典例促记】
⊙Have you ever gone on holiday on your own？(P49)
你独自去度假过吗？
⊙You’d better try to solve the problem on your own.
你最好自己尽力解决这个问题。
⊙I had to go to the cinema on my own because all the other boys were busy.
因为其他男孩都很忙，我只好独自去看电影了。
⊙He never joins with us and he always plays on his own.
他从不和我们在一起，他总是自己单独玩。
2. set off引起爆炸；引起；出发
【典例促记】
⊙Set off to explore and talk to the locals. (P49)
出发去探索并与当地人交谈。
⊙If you drop a lighted cigarette, you could set off a fire.
如果你把一根点燃的香烟扔在地上，就有可能引起火灾。
⊙Herald was only found because he set off some fireworks.
因为点燃了烟花，赫勒尔德才被人发现。
⊙They set up many branches throughout the country.
他们在全国建立了许多分公司。
⊙Some doctors advise setting aside a certain hour each day for worry.
一些医生建议每天留出一点时间来解决烦心事。
⊙Old Walter is setting down his memories of village life.
老沃尔特正在记录他对乡村生活的回忆。
⊙She set out that day to hunt for work.
她那天出发去找工作了。
常 用 句 式
1. Maybe, but only if it doesn’t look dangerous. (P49)
也许吧，但前提是看起来不危险。
【句型剖析】
本句中only if引导条件状语从句，意为“________”。
【典例促记】
⊙I told him that he would pass the test only if he studied hard.
我告诉他，只要努力学习就会通过考试。
⊙If only he had remembered to buy some fruit yesterday.
他昨天要是记得买些水果来该多好。
2. Now I spend three weeks out of every month travelling and have over 464，000 fans following me online. (P50)
如今我每个月用三周时间旅行，在线关注我的粉丝超过46. 4万人。
【典例促记】
⊙They built a highway leading(which led) into the mountains.
他们修建了一条通往山里的公路。
⊙We met a group of pupils returning(who were returning) from school.
我们碰到了一群从学校回来的孩子。
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