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原标题：【保藏】英语语法常识点汇总
1.as...as...引导的比照级：
(1)“as +描述词或副词原级+as+被比照目标”规划。例句： He studies as hard as you. 他像你相同学习尽力。
(2)在否定句或疑问句中可用 not so…as…. 例句：He can notrun so/as fast as you. 他没你跑得快。
2.only引导的倒装句型：only +状语 (或状语从句)位于句首时，语句有些倒装。
例句： Only by diligence and honesty can one succeed inlife. 只需勤勉、耿直，一自个在日子中才干成功。
留心：但 only润饰主语时，不倒装。例句： Onlythat girl knew how to work out the problem. 只需那位女人晓得怎样解那道题。
3.wish引导的虚拟口气：wish 后边的从句，当标明与实际相反的情况，或标明将来不太可以完成的期望时，其宾语从句的动词方法为：
⑴标明对如今情况的虚拟：从句动词用曩昔式或曩昔进行式标明，be 的曩昔式用were.
I wish I knew the answer to the question. 我期望晓得这个疑问的答案。(怅惘不晓得。)
⑵标明对曩昔情况的虚拟：从句动词用had +曩昔分词。
I wish (that) I hadn’t wastedso much time. 我后悔不该浪费这么多时刻。( 实践上现已浪费掉了。)
⑶标明对将来的片面期望：谓语动词方法为“would/ should/ could/ might +动词原形”。在这种情况下，主句的主语与从句的主语不能相同，因为主句的主语所期望的从句动作能否完成，取决于从句主语的情绪或自愿(非动作名词在外) 。
I wish it would stop raining. 期望雨能中止。
留心：若wish 后的宾语从句顶用 would，可以标明恳求，一般意味着说话人的不快或不满。
例句：I wish you would be quiet. 我期望你恬静一些。
4.it方法宾语：和it 作方法主语相同, 咱们常用it 来作方法宾语, 把真实的宾语从句放在句末, 这种情况特别呈如今带复合宾语的语句中。
例句：He has made it clear that he will not give in. 他标明他不会屈从。
5.The+比照级，the+比照级标明“越......越......”。
例句：The more scared we are, the stronger the difficultywill become.咱们越惧怕困难，困难就会变得越健壮。
6. 宾语从句：一般疑问句做宾语，引入if或whether
例句： I want to know if he will join us in thediscussion?
7. 缘由状语从句：since引导的
例句： Don’t eat too much sugarsince it is bad for your health.
8. 否定词前置倒装：scarcely...when...
例句： Scarcely had he arrived at home when it began torain.
9. If虚拟条件句
10. 宾语从句：放在介词后边，作介词的宾语。
例句：I know nothing about him except that he used towork in Shanghai.
11.状语从句省掉(分词作状语)：从句的主语和状语从句的主语共同，状从省掉选用分词作状语。
例句：
(Because) being short of money, we can’t afford a TV set. =Because we are short of money, we can’t afford a TV set.
12.并排句：由and,or , but联接的两个语句变成并排句。
13.省掉句 /倒装：so/系动词/助动词/神态动词 +sb 标明“前者情况适用于后者”。例句：
You are a student, so am I.
14.定语从句 who引导的限制性定从。
例句：Do youremember the girl who taught us English ?你还记住教咱们英语的那个女孩吗?
15.宾语从句：whether的用法。例句：I wonder if/whether it is going to rain tomorrow.
16.不定式做定语。例句：Theonly way to solve our problems will continue to be rejected.
17.缘由状从：now that的用法。now that 标明 “已然”。与 since 的不一样之处在于，now that 引出的有必要是一个新呈现的实际或情况，假定仍然如故，和曩昔比较并没有改变，则不必 now that 引导。
例句：Now that we have all the materials ready, we shouldbegin the new task at once.已然咱们把一切材料都预备好了，咱们大约马上初步这项新的作业。
18. 缘由状从：for的用法。由because 引导的从句假定放在句末，且前面有逗号，则可以用并排连词 for 来替代。但假定不是阐明直接缘由，而是多种情况加以揣度，就只能用 for。例句：He is absent today, because/for he is ill. 他今日没来，因为他患病了。
19. 缘由状从：as 的用法。例句：The Singapore passengers begin to decrease as otherairlines spread their operating range.
20. 同位语从句：Iwant to know the answer to this question who will be our next president.
缘由状从： in that的用法。例句：
Privatization is thought to be beneficial in that itpromotes competition. 私营化的利益在于能推进彼此竞赛。
21. 不定式：不定式做意图状语。例句：Weget up very early to catch the first bus.
22.同位语从句：同位语从句在句中作A同位语，对被润饰名词的内容予以说明阐明。同位语的特征是：笼统名词在前，表达具体内容的从句在后。常见的名词包括： assumption假定/belief观点/ conclusion结论/ doubt置疑等。 例句：The suggestion that we should develop the natural resources in theregion has been discussed. 关于咱们大约开发本区域本钱的主张现已谈论过了。
23.如今结束时：标明曩昔连续到如今的动作或状况。具体来说，这种用法是标明初步于曩昔的动作一向持续到如今，而且还可以持续持续下去。谓语动词一般为连续性动词。 例句：An old woman walked out into the middle of the street. The policemanyelled to her, “Don’t you knowwhat it means when I hold up my hand?” The lady said, “Sure I do. I have been a schoolteacher for 28 years now.” 一个老妇人走到了马路中心，这时，一位交警
朝着她嚷道：“我都把手举起来了，你莫非还不晓得啥意思吗?”老太太说：“我当然晓得，我都做了28 年的教师了。”
24. 时刻状从：not…until… 用法。例句：The students didn’t stop talking until the teacher came in.
25. it做方法主语，语句做逻辑主语：假定主语太长，常用代词 it 作方法主语，将真实的主语从句置于句尾，以坚持句式的平衡。
例句：It makes no difference what you read or study ifyou can’t remember it. 假定你记不住，那么你读啥或许学啥都不重要了。
26. 如今分词短语作状语：
(1)如今分词作时刻状语。例句：There areseveral things to consider when buying
fresh foods. 当收购新鲜食物时，有几个作业要思考。
(2)如今分词作条件状语。例句：Working hard,you will succeed. 假定尽力作业，你将会成功。
(3)如今分词作伴随状语。例句：All night longhe lay awake, thinking of the problem. 他整夜躺在床上睡不着，思考着那个疑问。
(4)如今分词作方法状语。例句：Please answerthe question using another way. 请用另一种办法答复疑问。
(5)如今分词作缘由状语。例句：Not knowingher address, I can’t write to her.因为不晓得她的地址，我无法给她写信。
(6)如今分词作成果状语。
例句：Possessing a car gives a much greater degree ofmobility, enabling the driver to move around freely. 具有轿车使机动程度更高，使司机能安适安适地交游各地。
(7)如今分词作让步状语。
例句：Although working from morning till night his fatherdidn’t get enough food.尽管他父亲从早到晚拼命干，可是仍是挣不可吃的。
27. 神态动词表估测
(1)对如今、将来情况的估测，用神态动词+动词原形
对如今、将来情况的必定估测：must+动词原形
对如今、将来情况的否定估测：can’t +动词原形
对如今、将来情况的可以估测：may/might +动词原形
例句：What is he doing?
He must be sleeping./He can’tbe reading./ He may/might be reading but I’m not sure.
(2)对曩昔情况的估测，用神态动词+have donesth.
对曩昔情况的必定估测：must+have done sth.
对曩昔情况的否定估测：can’t +have donesth.
对曩昔情况的可以估测：may/might +have done sth.
例句：It must / may / might / have rained last night. Theground is wet.
The door is locked. He cannot / may ( might ) not havebeen at home.
28. 有些倒装：否定词前置
(1)hardly/scarcely…when…
例句：Hardly had she gone out when a student came tovisit her.
她刚一出门，一个学生就来造访她。
(2)no sooner…than…
例句：No sooner had the game begun than it began to rainheavily.
竞赛刚一初步就下起了雨。
29. 动词 ing 方法作独立主格规划：逻辑主语和主句主语纷歧致时选用。
例句：Time permitting, we will go for a picnic tomorrow.(=f time permits, we will go for a
picnic tomorrow.) 假守时刻答应，咱们明日会去野餐。
30. even if 引导的让步状语从句：“即便”。
例句： Even if we achieve great success in our work, weshould not be proud.
即便咱们在作业中获得了无量成果，也不大约骄傲。
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