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课件网) Play by the rules 5 Unit Understanding ideas Grammar P71 语篇形态： 书面语篇 教学内容分析 Read the sentences from the reading passage and summarise the grammar rules. (a) I got on the train to go home. (b) I went to a quiet area in order to read. (c) I covered my nose so as to reduce the smell coming from Mr Smelly Food. Now find more sentences with these structures in the reading passage. (1) I covered my ears in order to block the noise coming from Rock Girl. (2) I turned around so as to see the other passengers' faces. 动词不定式作目的状语 设计意图：引导学生观察句子结构，尝试总结动词不定式作目的状语。通过提问的方式引导学生归纳其用法。 ① People plant trees to protect the environment. ② We clean the classroom to keep a tidy study environment. ③ To practice speaking, Tom joins the English club. 动词不定式用作目的状语，表示某一动作或状态的目的(做某事是为了什么)。 在作目的状语时，不定式既可以放在句尾，也可以放在句首。 动词不定式作目的状语 人们植树以保护环境。 我们打扫教室以保持整洁的学习环境。 汤姆加入英语俱乐部来练习口语。 ① In order to catch the sunrise, we get up at 5 o'clock. ② I check the map so as to find the shortest way to the park. ③ He runs to school so as not to be late. 为了看日出，我们5点就起床。 我查看地图，以便找到去公园的最短路线。 除了直接使用 to do sth 之外，为了使表达更加清楚或对目的加以强调，我们还可以使用 in order to do sth 和 so as to do sth作目的状语。需要注意的是，so as to 引导的不定式短语不能位于句首。 他跑步去学校，以免迟到。 否定形式：“in order not to do /so as not to do” （注意“to”前加“not”） 动词不定式作目的状语也可以和so that 引导的目的状语从句进行转换。 He gets up early to catch the first bus. = He gets up early so that he can catch the first bus. 他早起，以便能赶上第一班公交车。 ① She was sad to hear the bad news. ② I hurried to the station, only to find the train had left. ③ She is too young to go to school alone. 除了作目的状语之外，根据表达的需要，动词不定式还可以作原因状语和结果状语等。 听到这个坏消息，她很难过。 我匆忙赶到车站，却发现火车已经开走了。 她年纪太小，不能独自上学。 动词不定式作原因状语 动词不定式作结果状语 动词不定式作结果状语 Rewrite the sentences with to, in order to or so as to. 1 People wear seat belts in cars. People want to stay safe on the road. _____ _____ 2 Sally arrived at the train station before 6:00 am. She needed to catch the earliest train. _____ _____ 3 I listened carefully in maths class. I hope to improve my grades. _____ _____ 6 People wear seat belts in cars to / in order to / so as to stay safe on the road. Sally arrived at the train station before 6:00 am to / in order to / so as to catch the earliest train. I listened carefully in maths class to / in order to / so as to improve my grades. 设计意图：完成相关练习，应用动词不定式作目的状语的结构。 Complete the letter to Story Aunt using the notes in brackets and the grammar you have learnt. 7 Dear Story Aunt, 1_____ (I'm writing, share a touching story ... ...
