先看一个精彩的例句:
Where unemployment and crime are high, it can be assumed that the latter is due to the former.
在失业率和犯罪率高的地方，我们可以假定高犯罪率是由高失业率造成的。
分析：该句中 where 引导的是地点状语从句。
重难点词：unemployment n 失业 (状态)；失业人数；失业率
crime n 犯罪活动；罪行
assume v 假定；设想
latter n 后者
重难点词块及句型：due to 由于；因为
it is assumed (that) ... 认为是……
状语从句
时间状语从句的标志引导词有
when, whenever, while, as, since, after, before, until, once, as soon as, hardly / scarcely ... when, the moment, the minute, immediately等引导
地点状语从句
where, wherever等引导
原因状语从句
because, since, as, now that等引导
结果状语从句
so ... that, such ... that, so that等引导
条件状语从句
if, unless, as / so long as, in case, on condition that等引导
目的状语从句
原因状语从句
He is in poor health because he has been short of exercise for a long time.
他身体不好是因为长期缺乏锻炼。
As she was familiar with these places of interest, she volunteered as the tour guide of this trip.
因为对这些名胜古迹很熟悉，她自愿担任这次旅行的导游。
I should cut the amount of fat in my diet, since I put on weight easily.
我应该减少饮食中的脂肪含量，因为我很容易长胖。
结果状语从句
He talked so much that it’s impossible for me to get in a word.
他说起话来滔滔不绝，我一句话都插不进去。
The movie was so boring that I could hardly keep from falling asleep.
这部电影太乏味了，我差点睡着了。
Thanks to his help, my speech was so successful that everyone cheered for me.
多亏他的帮助，我的演讲才如此成功，人人都为我喝彩。
It was such a relief to hear that my friend was found safe and well.
听到我朋友被找到了，并且安然无恙，真是如释重负。
条件状语从句
Unless we take pains to prepare, we won’t win the match against the other class.
如果我们不竭尽全力准备，在与其他班的比赛中就赢不了。
If this is your idea of a joke, I don’t find it at all funny.
你认为这是个玩笑，我却一点儿也不觉得好笑。
目的状语从句
I have been dreaming about becoming a journalist so that I can fight against evil and spread justice.
我一直梦想成为一名记者，这样我就可以惩恶扬善。
The football players did a lot of practice in order that they could win the match against England.
为了赢得与英格兰队的比赛，球员们进行了大量的训练。
You must remind him to take his medicine, in case he forgets.
你要提醒他吃药，以防他忘了。
方式状语从句
She covered her face with her hands and looked as if she had cried.
她双手掩面，看起来好像刚刚哭过。
让步状语从句
Although I don’t do well at school, I still have a desire for parents’ approval.
虽然学习成绩不好，但我仍然渴望父母认可我。
My father encouraged me to have a try even though I might fail.
我爸爸鼓励我，哪怕失败，也要试一试。
We will never give up studying, whatever happens.
无论发生什么事, 我们都不会放弃学习。
