外研版九年级英语下册《You must be careful of falling stones》Rules and suggestions PPT课件(第2课时)，共20页。
get lost意为“迷路”，其同义短语为lose one's way。
eg：It's very easy to get lost in the forest.在森林里很容易迷路。
You mustn't go off on your own.你们不许独自离开。
①go off在此处意为“离开”。
eg：She went off to get a drink.她离开去拿饮料了。
【拓展】go off还意为“爆炸；响起；熄灭；变质；变坏”。
eg：I woke up when my alarm clock went off.闹钟一响我就醒了。
Milk goes off quickly in hot weather.牛奶在热天很快就会变坏。
②on your own意为“独自；单独”；相当于all by yourself或alone。
on one's own意为“独自地；独立地”，其中one's要随主语的人称变化而变化。
I'll lead the way.我来带路。
lead the way意为“带路”。
eg：I don't know the way to the library.Who will lead the way？我不知道去图书馆的路，谁来带路？
【拓展】lead用作及物动词时，有如下含义：
①引导；领(路)
eg：She led me into the living room.她带我进入客厅。
②领导；指挥；率领
eg：They will let the young man lead the basketball team.他们将会让这位年轻人领导这个篮球队。
③过(某种生活)
eg：We lead a very quiet life.我们过着非常安静的生活。
④造成；导致
eg：What led him to break the rules？是什么导致他违反规定？
重点词组归纳
at noon在下午
in one go一口气；一下子
be careful of小心；注意
begin with以······开始
get up to到达；达到
... ... ...
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