【例句研读】

(1) If necessary，you can ask him for help.

如果有必要的话，你可以向他求助。

(2) David seldom asks his father，if ever，for help when in trouble.

当遇到麻烦时，(如果曾经有)戴维也很少求助于父亲。 【即时巩固】

(1) It sounds like something is wrong with the car's engine. ________________， we'd better take it to the garage immediately.听上去汽车的发动机好像坏了。如果真的是这样的话，我们最好立刻把它送到修理厂。

(2) _________ should happen to him, that would be too bad.如果有什么意外的事降临到他的头上，那可就糟了。

(3) They were ready to die, ________________， for their country.必要时，他们愿为国捐躯。

【答案】 (1) If so (2) If anything unexpected (3) if necessary ●考点2 “be doing...when...”句型

【教材原句】John was studying in his room when he heard screaming.约翰正在屋里学习，这时他听到了尖叫声。 【句法分析】

句中使用了“be doing...when...”句式，意为“正在/正要做某事，这/那时(突然)……”，其中when作并列连词相当于and then，and at that time，连接两个并列分句，其前面分句的谓语动词常用过去进行时，而后面分句的谓语动词多用一般过去时。 相关的结构还有：

主语+be about to do...when...即将做……这时(突然)…… 主语+be doing...when...正要/正在做……这时(突然)…… 主语+be just going to do...when...正要做……这时(突然)…… 主语+be on the point of doing...when...正要去做……这时(突然)…… 主语+had done...when...刚刚做完……这时(突然)…… 【例句研读】

(1) They were having classes when the earthquake happened.他们正在上课，那时突然地震发生了。

(2) Lily was about to study when someone knocked at the door.莉莉正要学习，这时

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有人敲门。 【即时巩固】

(1) I was playing computer games _______electricity was cut off.昨晚我正在玩电脑游戏，这时停电了。

(2 I was _______going/________ go out when the telephone rang.我正要出去，这时电话铃响了。

(3) I my homework when my mother asked me to help her clean the house.我刚做完作业，妈妈就叫我帮她打扫房间。

【答案】(1) when (2) on the point of; was about to (3) had just finished 考点3 There is no doubt that… 毫无疑问……

【教材原句】There is no doubt that John's quick thinking and the first aid skills he learned at school saved Ms Slade's life.

毫无疑问，是约翰敏捷的思维和在学校学到的急救技术，挽救了斯莱德女士的生命。

【归纳拓展】

There is no doubt that… 毫无疑问…… There's some doubt whether...……值得怀疑 sb.have/has no doubt that...＝sb.don't/doesn't doubt that...某人相信…… sb.have/has some doubt whether...＝sb.doubt/doubts whether...某人怀疑…… out of/beyond doubt毫无疑问 without doubt无疑地 【句法分析】

(1)There is no doubt that…是一个固定句型，that引导的是同位语从句，no 也可以换成little。若把no换成some，则that要换成whether。如： There is some doubt whether he can win. 人们怀疑他是否能赢。

(2)此外，后接名词或代词时要用介词about。There is no doubt about…意为“坚信……”；There is some doubt about…意为“……不太确定”。如： Well, I have no doubt about it. 噢，对此我坚信不疑。 【例句研读】

（1）There is no doubt that nearsightedness is a serious problem among the youth

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of our country.

在我们国家，年轻人近视无疑是一个严重的问题。

（2）There's some doubt whether the meeting will be held as planned.会议能不能按计划召开还值得怀疑。 【即时巩固】

（1）There is _________that China is a growing powerhouse.

毫无疑问中国是个日益强大的国家。

（2）I ___________that he is honest.＝I________- he is honest.我相信他是诚实的。 （3） no doubt that our educational system is unsatisfactory. 毫无疑问，我们的教育制度是不太令人满意的。

【答案】（1）no doubt（2）have no doubt; don't doubt that（3）There is 考点4 It is/was＋被强调部分＋that/who/whom…

【教材原句】It was John's quick action and knowledge of first aid that saved Ms Slade's life.正是约翰快捷的动作和急救知识救了斯莱德女士的生命。 【句法分析】

(1)强调句的一般疑问句：

Is/Was it＋被强调部分＋that/who/whom…？ (2)强调句的特殊疑问句： 特殊疑问词＋is/was it＋that…？ (3)对not until时间状语从句的强调： It is/was＋ not until…＋that… It was Tom who/that I met last week. 我上周见到的是汤姆。

Was it ten years ago that his father died? 他的父亲是十年前去世的吗？ When is it that you will set off? 你到底什么时候出发？

It was not until yesterday that I knew the news. 直到昨天我才知道那条消息。 【温馨提示】

(1)强调句型的判断方法：将It is/was和that/who同时去掉，看剩下的部分句式是否

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仍然完整。若完整，则是强调句型；若不完整，则为状语从句、定语从句或主语从句。

(2)强调主语或宾语且其为人称代词时，应注意其形式仍用主格或宾格形式。 (3)强调主语时，that或who后面的谓语动词必须和主语在人称和数上保持一致。 【例句研读】

（1）It was hard work rather than luck that determined his success.是勤奋而非运气决定了他的成功。

（2）It was when my mom came back home that I went to sleep.等妈妈回到家时，我才睡觉的。 【即时巩固】

（1）I wonder if ______________ I haven't been able to be outdoors for so long that I've grown so crazy about everything to do with nature. 我不知道是否因为我这么长时间没能够到户外去，以至于我对大自然中的一切变得这么狂热。

（2）__________________ Hawking does not like about his speech computer?霍金对他的语音电脑不满意的地方是什么呢？

（3）It was____________ that I knew it.直到昨天我才知道此事。 【答案】（1）it's because（2）What is it that（3）not until yesterday

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