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1、2017小升初英语必备英语语法：一般现在时的用法1)经常性或习惯性的动作，常与表示频腮度的时间状语连用。时间状语：every，sometimes，at，on SundayI leave home for school at7 every morning. 2)客观真理，客观存在，科学事实。 The earth moves around the sun.Shanghai lies in the east of China. 3)表示格言或警句中。Pride goes before a fall.骄者必败。注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。例：Colum
2、bus proved that the earth is round.4)现在时刻的状态、能力、性格、个性。I dont want so much.Ann Wang writes good English but does not speak well.比较：Now I put the sugar in the cup.I am doing my homework now.第一句用一般现在时，用于操作演示或指导说明的示范性动作，表示言行的瞬间动作。再如：Now watch me，I switch on the current and stand back.第二句中的now是进行时的标志，表示正
3、在进行的动作的客观状况，所以后句用一般现在时。2017年小升初英语语法知识点：一般现在时1.一般现在时表示经常或习惯性的动作，也可表示现在的状态或主语具备的性格和能力。2.一般现在时中，没有be动词和情态动词，主语为第三人称单数的肯定句，动词要按规则加上s，主语是非第三人称单数的肯定句，动词用原形。3.在一般现在时中，句中有be动词或情态动词时，否定句在be动词和情态动词后加not，一般疑问句将be动词或情态动词放在句首。4.在一般现在时中，句中没有be动词或情态动词时，主语为第三人称单数的否定句在动词前加does+not （doesnt），一般疑问句在句首加does，句子中原有动词用原形；主
4、语为非第三人称单数，否定句用do+not （dont），一般疑问句在句首加do，句子中动词用原形。动词+s的变化规则1.一般情况下，直接加-s，如：cook-cooks， milk-milks2 .以s. x. sh. ch. o结尾，加-es，如：guess-guesses， wash-washes， watch-watches， go-goes3.以“辅音字母+y”结尾，变y为i， 再加-es，如：study-studies2017小升初英语必备英语语法：数词篇表示数目多少或顺序多少的词叫数词，数词分为基数词和序数词。表示数目多少的数词叫基数词；表示顺序的数词叫序数词。一、基数词1）基数词
5、写法和读法：345 three hundred and forty-five；2）基数词一般是单数形式，但下列情况，常用复数：a.与of短语连用，表示概数，不能与具体数目连用，如scores of people指许多人；b.在一些表示“一排”或“一组”的词组里；如：They arrived in twos and threes.他们三三两两的到达了。c.表示“几十岁”；d.表示“年代”，用in+the+数词复数；e.在乘法运算的一种表示法里，如：3x5=15 Three fives is（are）fifteen.二、序数词序数词的缩写形式：first1st second2nd thirty-f
6、irst31st三、数词的用法1）倍数表示法a.主语+谓语+倍数（或分数）+as+adj.+asI have three times as many as you.我有你三倍那么多。b.主语+谓语+倍数（分数）+the size（amount，length）ofThe earth is 49 times the size of the moon.地球是月球的49倍。c.主语+谓语+倍数（分数）+形容词（副词）比较级+thanThe grain output is 8 percent higher this year than that of last year.今年比去年粮食产量增加8%。d.
7、还可以用by+倍数，表示增加多少倍The production of grain has been increased by four times this year.今年粮食产量增加了4倍。2）分数表示法构成：基数词代表分子，序数词代表分母。分子大于1时，分子的序数词用单数，分母序数词用复数：1/3 one-third；3/37 three thirty-sevenths.2017小升初英语必备英语语法：名词变复数变化规则1、 一般情况下，直接加-s，如：book-books，bag-bags，cat-cats，bed-beds2、以s、x、sh、ch结尾，加-es，如：bus-buses，
8、box-boxes，brush-brushes，watch-watches3、以“辅音字母+y”结尾，变y为i，再加-es，如：family-families，strawberry-strawberries4、以“f或fe”结尾，变f或fe为v，再加-es，如：knife-knives5.不规则名词复数：man-men，woman- women，policeman-policemen，policewoman-policewomen，mouse-mice child- children foot-feet，tooth-teeth fish-fish，people-people，Chinese-
9、Chinese，Japanese-Japanese2017小升初英语必备英语语法：虚拟语气如果你看到下列的句子，你会认为它们是正确的还是错的呢？1.I wish I were a bird.2.Were quest that you be here tomorrow.也许你会说：哈哈，第一句的I were错了，应该是I was；而第二句中的you be是什么东东呀？不是you are，也不是 you will be，什么you be？！其实上面的句子都是一种称为Subjunctive类型的句子。Subjunctive Mood有的书译为假设语气，虽不很贴切；但在相当大的程度上，告诉我们这种句子
10、的特点。Subjunctive Mood中文译作虚拟语气，似乎不及假设语气那么容易明白。它是一种动词形式，表示说话人的某种假设、愿望、怀疑、猜测、建议等含义。基本上，虚拟语气可分为虚拟现在 (Subjunctive Present)和虚拟过去(Subjunctive Past)两种；但它们和时态(Tenses)上所指的现在时态 (Present Tense)和过去时态(Past Tense)是有所不同的。一、虚拟现在(Subjunctive Present)：虚拟现在的句子，在任何时候都要用动词的原形(root form)，就算是第三人称(he，she，it)也是如此。如：1.1现在时态(Si
11、mple Present)：(右边为虚拟语气)I work-I workyou work-you workhe works-he work(注意到了吗，是work，不是works)she works-she work(不是she works喔）it works-it work(同样不是itworks喔)we work-we workthey work-they work1.2现在进行时态(Present Continuous)：(右边为虚拟语气）I am working-I be working(注意用的是be，怪怪的！)you are working-you be workinghe is
12、working-he be workingshe is working-she be workingit is working-it be workingwe are working-we be workingthey are woring-they be working1.3现在完成时态(Present Perfect):(右边为虚拟语气)I have worked - I have workedyou have worked - you have workedhe has worked - he have worked (用的还是have喔)she has worked - she hav
13、e workedit has worked - it have workedwe have worked - we have workedthey have worked - they have worked1.4现在完成进行时态(Present Perfect Continuous):(右边为虚拟语气)been workingit has been working - it have been workingwe have been working - we have been workingthey have been working - they have been working谈谈虚
14、拟语气(Subjunctive Mood)（二）二、虚拟过去(Subjunctive Past)虚拟过去的动词无论在什么情况之下都要用过去复数形式。如：动词 be，在虚拟过去中要用 were。2.1过去时态(Simple Past):(右边为虚拟语气)I worked - I workedyou worked - you workedhe worked - he workedshe worked - she workedit worked - it workedwe worked - we workedthey worked - they worked2.2过去进行时态(Past Continuous):(右边为虚拟语气)I was working - I were working （注意是 I were）you were working - you were workinghe was working - he were working (是 he were 喔)she was working - she were workingit was w
