在英语语法中，动词不定式是指不被限定的一种动词形式，即一种不带词形变化从而不指示人称、数量和时态的形式。而不定式的特殊句型有哪些呢？它的结构有哪些呢？今天小编想跟大家说说：不定式的特殊句型so as to：

不定式的特殊句型so as to，它的用法有哪些？

1） 表示目的；它的否定式是so as not to do。

Tom kept quiet about the accident so as not to lose his job.　

汤姆对事故保持沉默是为了不丢掉他的工作。

Go in quietly so as not to wake the baby.

 轻点进去，别惊醒了婴儿。

Colcord agreed to do this so as not to disappoint the crowd.

为了不让观众失望，克尔科特同意了

Do not smoke in bed, so as not to cause a fire.

不可在床上吸烟，以免引起火灾。

He kept silent about the incident so as not to lose his job.

他为了不被开除，在这件事上保持了沉默。

Eventually he started this book so as not to drown.

最终，为了不“溺亡”，他开始写这本书。 

But this historical data should be kept separate from the current problem determination artifacts, so as not to interfere with them.

但是应该将这种历史数据与当前问题确定构件分开进行保存，这样它们就不会互相干扰。 

2)　so kind as to ---劳驾

you be so kind as to tell me the time?

 劳驾，现在几点了。

Would you be so kind as to help me with the box?

请帮我拿一下箱子好吗？

All right, but would you be so kind as to make up your mind soon? We're very busy just now as you can see, sir.

好的，但是劳驾你快点做决定吗？正如你看到的，我们现在很忙，先生。

Would you be so kind as to turn down the radio?

劳驾你把收音机调小声一点好吗？

Would you be so kind as to open this window for me? Its stuffy.

你能帮我将窗户打开吗？这里快令人窒息了。

Would you be so kind as to do me a favour?

请你帮我一下好吗？

好了，以上就是对不定式的特殊句型so as to的介绍，原则上来说，不定时的一般式（to do）比较常见，易考点也比较多，但我们还是应该了解不定式的这一形式，做到系统化地学习。