語(yǔ)法難點(diǎn)精析之被分隔的定語(yǔ)從句】
care must be taken in using this method lest overflow should occur.在使用此法時(shí)要小心謹(jǐn)慎，以免會(huì)發(fā)生溢流現(xiàn)象。
（3）通過(guò)上下文及內(nèi)在含義，句中往往有but, otherwise, unfortunately等類(lèi)似轉(zhuǎn)折詞。
i thought the children when we returned home, but they were still awake.
a. were sleeping b. would be sleeping c. had been sleeping d. would sleep選擇 b。
(4)形容詞及其比較級(jí)
a more careful person would not have made so many mistakes.
a less conscientious man wouldn’t have tried so hard to get this job done.
(5)分詞短語(yǔ)
having known in time, we might have prevented the accident.
born ten days earlier, the boy could have seen his late father.
(6)動(dòng)詞不定式短語(yǔ)。一般intended/meant/hoped/wished/planned 或 was/were+不定式完成式或had intended/meant/planned/hoped/wished/+不定式一般式表示虛擬。
i intended i should call on you, but i was busy at that time.
to hear him speak french, you would take him for an englishman.
she would be stupid not to accept his invitation.
it would be easier to do it this way.
(7)名詞短語(yǔ)和名詞+and結(jié)構(gòu)
a judicious man would not have committed suicide.
a diligent student would have worked harder.
(8)獨(dú)立主格結(jié)構(gòu)
all things considered, the price would be reasonable.
(9)定語(yǔ)從句
anyone who had been in your position would have done the same.
a nation, which stopped working, would be dead in a fortnight.
(10）情態(tài)動(dòng)詞完成式暗示虛擬語(yǔ)氣：
i should have called to make an airline reservation, but i didn’t.
the porter ought to have called the fire-brigade as soon as he saw the fire in the stock, which went up in smoke.
(11)動(dòng)詞原形表示虛擬
動(dòng)詞原形直接用在句子中也被看作是一種虛擬，最常見(jiàn)于正式文體中，動(dòng)詞原形一般用在條件從句中，有時(shí)倒裝置于句首，同時(shí)這種用法也常見(jiàn)于獨(dú)立句中表達(dá)愿望。
god bless you!
all magnets behave the same, be they large or small.
she’ll be sixteen years odd, com may.(come may =when may come).
if that be so, we shall take action at once.
強(qiáng)化訓(xùn)練：虛擬語(yǔ)氣
1.were it not for the snowy weather, we all right.
a. would be b. would have been c. were d. may be
2. more careful, his ship would not have sunk.
a. if the captain were b. had the captain been
c. should the captain be d. if the captain would have been