… in order/so as to …

结构︰

in order／so as＋to-不定词…

说明︰

此句型意为“为了…；想做…就得…”。这是表目的的不定词句型，意思更为明确。

He must work very hard in order to support his large family.
他必须拼命工作以养活他的大家庭。
Listen carefully so as to follow the teacher.
要仔细听才能听懂老师讲的课。
You must watch your step so as not to fall down.
你必须留心脚下才不会跌下去。