重点句型
1. You should not only listen to the teacher's and your classmates' pronunciation, but also to tapes and broadcasting.
你不但应该听老师和同学们的发音,还应该听录音带和广播。
2. Leave the motor on.
让发动机开着。
3. Simply raise your hand, and a taxi appears in no time.
只要你招招手，马上就会有出租车开过来。

句型探究
1. Leave the motor on.
让发动机开着。
Leave them as they are.
让那些东西保持原状吧。
这是一个leave的复合宾语结构，“leave+复合宾语”的基本含义是“让……处于某种状态”。
常用结构有：
leave sb. / sth.+adj. / n. / adv. / 介词短语
leave sb. / sth.+介词短语
leave sb. doing sth.
leave sth. done
leave sb. to do.
leave sb. / sth.+as / where 引导的方式状语从句

They walked off, leaving me sitting there all by myself.
他们走了，让我一个人孤零零地坐在那儿。
Don't leave your work half done.
工作不要半途而废。
Always leave things where you can find them again.
把东西放在容易找到的地方。
2. You should not only listen to the teacher's and your classmates' pronunciation, but also to tapes and broadcasting.
你不但应该听老师和同学们的发音，还应该听
录音带和广播。
句型探究
not only......but (also)...... 不但……而且……是并列连词，可以连接两个并列的主语、谓语、表语和状语，连接并列主语时谓语动词采用就近原则。还可以连接两个分句，not only 位于句首时，其后的句子用部分倒装，而but (also)后的句子不用倒装。
Not only my parents but also I am fond of sports.
不但父母而且我也喜欢运动。
He is not only a teacher but also a friend for us.
他不仅是我们的老师也是我们的朋友。
Not only does he teach at school, but he writes songs.
他不仅在学校教书，而且还写歌曲。