初中生应该掌握的英语语法知识有哪些

2024-11-04 09:11:47
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回答1:

初中生应该掌握的英语语法知识有哪些
几种简单句子结构:
主谓
主谓宾
there be
八大时态;
初中英语语法总结
( 动词的时态)
一般现在时的用法
1) 经常性或习惯性的动作,常与表示频度的时间状语连用。时间状语: every…, sometimes, at…, on Sunday。例如: I leave home for school at 7 every morning. 每天早上我七点离开家。
2) 客观真理,客观存在,科学事实。例如: The earth moves around the sun. 地球绕太阳转动。 Shanghai lies in the east of China. 上海位于中国东部。
3) 表示格言或警句。例如: 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:Columbus proved that the earth is round. 哥伦布证实了地球是圆的。
4) 现在时刻的状态、能力、性格、个性。例如: I don't want so much. 我不要那么多。 Ann writes good English but does not speak well. 安英语写得不错,讲的可不行。 比较:Now I put the sugar in the cup. 把糖放入杯子。 I am doing my homework now. 我正在做功课。 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。第二句中的now是进行时的标志,表示正在进行的动作的客观状况,所以后句用一般现在时。

一般过去时的用法
1)在确定的过去时间里所发生的动作或存在的状态。例如:时间状语有:yesterday, last week, an hour ago, the other day, in 1982等。例如: Where did you go just now? 刚才你上哪儿去了?
2)表示在过去一段时间内,经常性或习惯性的动作。例如: When I was a child, I often played football in the street. 我是个孩子的时候,常在马路上踢足球。 Whenever the Browns went during their visit, they were given a warm welcome. 那时,布朗一家无论什么时候去,都受到热烈欢迎。
3)句型:It is time for sb. to do sth "到……时间了" "该……了"。例如:It is time for you to go to bed. 你该睡觉了。 It is time that sb. did sth. "时间已迟了" "早该……了" ,例如It is time you went to bed. 你早该睡觉了。 would (had) rather sb. did sth. 表示'宁愿某人做某事'。例如:I'd rather you came tomorrow.还是明天来吧。
4) wish, wonder, think, hope 等用过去时,作试探性的询问、请求、建议等,而一般过去时表示的动作或状态都已成为过去,现已不复存在。例如:I thought you might have some. 我以为你想要一些。 比较:Christine was an invalid all her life.(含义:她已不在人间。) Christine has been an invalid all her life.(含义:她现在还活着) Mrs. Darby lived in Kentucky for seven years. (含义:达比太太已不再住在肯塔基州。) Mrs. Darby has lived in Kentucky for seven years. (含义:现在还住在肯塔基州,有可能指刚离去) 注意: 用过去时表示现在,表示委婉语气。
动词
1)want, hope, wonder, think, intend 等。例如: Did you want anything else? 您还要些什么吗? I wondered if you could help me. 能不能帮我一下。
2)情态动词 could, would。例如: Could you lend me your bike? 你的自行车,能借用一些吗? 11.3 used to / be used to used to + do:"过去常常"表示过去习惯性的动作或状态,但如今已不存在。例如: Mother used not to be so forgetful. 老妈过去没那么健忘。 Scarf used to take a walk. 斯卡夫过去常常散步。 be used to + doing:对……已感到习惯,或"习惯于",to是介词,后需加名词或动名词。例如: He is used to a vegetarian diet. Scarf is used to taking a walk. 斯卡夫现在已习惯于散步了。 典型例题 ---- Your phone number again? I ___ quite catch it. ---- It's 69568442. A. didn't B. couldn't C. don't D. can't 答案A. 本句虽没有明确的时间状语,但从语意上看出,在听的时候没有听懂这个动作发生在过去,因此应用过去时。
4 一般将来时
1) shall用于第一人称,常被will 所代替。will 在陈述句中用于各人称,在征求意见时常用于第二人称。例如: Which paragraph shall I read first? 我先读哪一段呢? Will you be at home at seven this evening? 今晚七点回家好吗?
2) be going to +不定式,表示将来。 a. 主语的意图,即将做某事。例如:What are you going to do tomorrow? 明天打算作什么呢? b. 计划,安排要发生的事。例如:The play is going to be produced next month。这出戏下月开播。 c. 有迹象要发生的事。例如:Look at the dark clouds, there is going to be a storm. 看那乌云,快要下雨了。
3) be +不定式表将来,按计划或正式安排将发生的事。例如: We are to discuss the report next Saturday.我们下星期六讨论这份报告。
4) be about to +不定式,意为马上做某事。例如: He is about to leave for Beijing. 他马上要去北京。 注意:be about to do 不能与tomorrow, next week 等表示明确将来时的时间状语连用。
5) be going to / will 用于条件句时,be going to表将来,will表意愿。例如: If you are going to make a journey, you'd better get ready for it as soon as possible. Now if you will take off your clothes, we will fit the new clothes on you in front of the mirror.
6) be to和be going to be to 表示客观安排或受人指示而做某事,be going to 表示主观的打算或计划。例如: I am to play football tomorrow afternoon. 明天下午我去踢球。(客观安排) I'm going to play football tomorrow afternoon. 明天下午我想去踢球。(主观安排)
一般现在时表将来
1)下列动词come, go, arrive, leave, start, begin, return的一般现在时可以表示将来,主要用来表示在时间上已确定或安排好的事情。例如: The train leaves at six tomorrow morning. 火车明天上午六点开。