1.If引导的条件状语从句，注意虚拟语气

If astudent wants to learn about job-specific information, they donot need to sit in aclassroom to get it.

如果一个学生想要了解特定的工作信息，他们就不需要坐在教室里去获取。

If sufficientsuburban railway and underground railway were built, traffic on the roads wouldbe significantly reduced.（虚拟语气）

如果修建了足够的城铁和地铁，路上的交通量就会大大的减少。

2.When引导的时间状语从句

whenstudents live with their parents, many of them are spoilt by theirparents.

当学生们和父母住在一起，他们中的很多人被父母宠坏了。

3.While（虽然、尽管）引导的让步状语从句

Whilethe economic development has made our life more comfortable, it has also polarised thesociety in the distribution of wealth.

虽然经济发展使我们的生活更加舒适，但它也使社会在财富分配上产生了两极分化。

Some areconcerned that it will bring abouttoo many side effects while othersinsist that it should be supported and encouraged.

一些人担心这会带来太多的副作用，而另一些人则坚持认为应该得到支持和鼓励。

4.Because引导的原因状语从句

Schoolsshould tell the truth to their boys and girls, because schools’ instruction is more persuasivethan other sources.

学校应该把真相告诉孩子们，因为学校的教育比其他来源更有说服力。

5.结果状语从句

In orderto stimulate domestic consumption, the public are encouraged to have their ownprivate cars so that in metropolises with densepopulation, such apolicy would really trigger more vehicles on roads.

为了刺激国内消费，鼓励公众拥有私家车，所以在人口密集的大都市，这样的政策就会造成道路上更多的车辆。

6.比较状语从句

It is noteven always true that modern technology is more complex to use than itwas to perform household chores.

使用现在科技比做家务更复杂，这一点并不总是正确的。