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初中英语时态讲与练.docx

发布:2018-04-25约3.68万字共38页下载文档
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初中英语时态汇总一般现在时【定 义】一般现在时表示现在经常反复发生的动作、存在的状态或习惯性的动作。即描述我们日常生活中的衣食住行等活动。【用 法】在实际应用中,一般现在时常与以下时间状语联用:always, usually, often, sometimes, every week (day, year, month, once a week, on Sundays ……例句:He usually plays football on Sundays.(2)没有时间状语,可以分以下四种类型:A.be型?? 这一类型由be动词+名词、形容词、副词、代词、数词或介词短语等一起构成谓语,表示主语的个性、特征或状态。如:?? ①I am a student.(主语+be动词+名词)?? ②They are hungry.(主语+be动词+形容词)?? ③He is out.(主语+be动词+副词)?? ④That pen is mine.(主语+be动词+代词)?? ⑤I am fifteen.(主语+be动词+数词)?? ⑥The bike is under the tree.(主语+be动词+介词短语)B.do型?? do型由行为动词充当谓语,表示经常性或习惯性的动作,其构成为“主语+动词原形或动词第三人称单数形式”。如:?? ①I know it.?? ②He believes me.C.there be型?? there be型句子表示“某地存在…”,其构成为“there be+主语+其他”,表示客观事实。用法遵循“就近原则”,即主语是单数或并列主语中的第一个主语是单数,则用there is;主语是复数或并列主语中的第一个主语是复数,则用there are。如:?? (1)There is an eraser on the teachers desk.(主语an eraser是单数)?? (2)There is an orange,five apples and eight bananas in the bag.(并列主语中的第一个主语an orange是单数)D.情态动词型??情态动词型句子的构成为“主语+情态动词+动词原形”,情态动词和动词原形一起构成谓语,表示说话人对所叙述的动作或状态的看法。如:?? ①He can speak a little English.(can+speak)?? ②May I have a book, please?(may+have)【练 习】用所给词的适当形式填空。(Be动词)一般现在时中的be动词有四中形式: am is are be其中:am用于一人称主语I之后,构成I am…句型。 is 用于三人称单数主语she, he, it或单个的人和物之后,构成She/He/It is…句型。 are用于二人称you或复数主语we, they之后,构成You/We/They are…句型。 be为该动词的原形,用于情态动词can, may, must…之后或用于祈使句中。 如:Be careful! 当心!1. Jim __________(be) a hard-working student at school.2. __________(be) Tom and Sam in the same class?3. Your school life __________(be) very interesting.4. There __________(be) a pen, two rulers and some books on the desk.5. The boys __________(be) very friendly to me.6. Maria __________(be not) from the U.S.A.7. __________(be) there any trees and a pool in the yard? 8. I want to __________(be) a teacher.9. Mr. Wang can’t __________(be) at home, because the lights are off.10. Don’t __________(be) late for school again.用所给词的适当形式填空。(情态动词)情态动词有 can“能够,可以” may“可以” must必须 + 动词原形(不需变化) should 应该1. My mom can __________(cook) food well.2. Must she _
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