① in order to+動(dòng)詞原形和so as to+動(dòng)詞原形都可以放在句中。
She got up early in order to/so as to/catch the first bus. 她早早起了床,以便趕上頭班車。
The doctors gave her a general checkup so as to/in order to find out the cause of her illness. 醫(yī)生給她做了全身檢查,以便找出她的病因。
② in order to可放在句首,而so as to則不可。
In order to win the watch,they practised hard. 為了贏得比賽,他們刻苦訓(xùn)練。
In order to get good results,we ought to do our best to study the lessons. 為了獲得好成績,我們應(yīng)盡最大努力學(xué)好課程。
③ so as to可分開用,而in order to則不可。
The teacher spoke so slowly as to be understood by the students. 老師說得很慢,以便學(xué)生能聽得懂。
The policeman ran so fast as to catch the robber. 那位警察跑得很快,以便能抓住搶劫犯。
④ so as to有否定形式 so as not to,而in order to則沒有。
She went in quietly so as not to wake the baby. 她輕輕地進(jìn)去,以免把嬰兒吵醒。
He started early so as not to be bate. 他早早動(dòng)了身,以免遲到。
⑤ in order that后跟從句,引導(dǎo)目的狀語從句,相當(dāng)于 so that,句中謂語常含有 can,may,might,could 等情態(tài)動(dòng)詞。
I lent her some money in order that she could go for a holiday. 我借給了她一些錢,以便她能去度假。
He saved much money in order that he might buy a car. 他存了許多錢,以便能買輛車。
提示
如果 in order that 所引導(dǎo)的從句主語同主句主語一致,可以轉(zhuǎn)換為 in order to+動(dòng)詞原形結(jié)構(gòu)。
我們學(xué)習(xí)知識(shí),這樣,我們就能變得聰明起來。
We learn in order that we can become wise.
提示
so…as to 可引導(dǎo)結(jié)果狀語從句,相當(dāng)于 enough to。
The explosion was so loud as to be heard twenty miles away. 爆炸聲很大,20英里外都聽得見。(=loud enough to be heard)
He studied so hard as to catch up with his classmates. 他刻苦學(xué)習(xí),趕上了同學(xué)。(=hard enough to catch up with)