例句
a. Hating people is like burning down your own house to get rid of a rat.
憎恨别人，就好像为了赶走一只老鼠而把自己的房子烧掉。
b. To avoid criticism, do nothing, say nothing, be nothing.
c. To acquire knowledge, one must study; but to acquire wisdom, one must observe.
d. We had better start early to catch the train.
e. I went to the post office to mail a letter.
我们可用in order to或so as to来强调目的状语。
例句
a. We had better start early so as to catch the train.
b. I went to the post office in order to mail a letter.
c. I quote others in order to better express my own self.
我引用别人的话，是为了更好地表达自己。
d. The teacher raised her voice in order for us to hear more clearly.
注意：so as to do一般不用在句首，但to do或in order to do可提到句首。