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初二(八年级)下册英语第三单元知识点

[02-12 21:43:37]   来源:http://www.kgf8.com  初二英语知识点   阅读:8320

概要:三丶重点短语知识点:过去进行时a) 过去进行时由“was/were+动词ing形式”构成。以动词work为列,b) 其肯定式,c) 否定式,d) 疑问式以及简略答语见下表:肯定式:I/He/She/It was working. We/You/ They were working.否定式:I/He/She/It was not working. We/You/They were not working.疑问式和简略答语:Was I working? Yes, you were.Was he working? No, he wasn’t.【注意】was not常简略为wasn’t; were not常简略为weren’te) 过去进行时的用法:过去进行时表示过去某一时刻或某一段时间正在进行的动作。这一特定的过去时间,f) 除有上,g) 下文暗示以外,h) 一般用时间状语来表示not …until直到…才。表示动作在某时之前尚未开始,直到此时动作才开始。not…un

初二(八年级)下册英语第三单元知识点,标签:八年级英语知识点,http://www.kgf8.com

  三丶重点短语

  知识点:

  过去进行时

  a) 过去进行时由“was/were+动词ing形式”构成。以动词work为列,b) 其肯定式,c) 否定式,d) 疑问式以及简略答语见下表:

  肯定式:I/He/She/It was working. We/You/ They were working.

  否定式:I/He/She/It was not working. We/You/They were not working.

  疑问式和简略答语:Was I working? Yes, you were.

  Was he working? No, he wasn’t.

  【注意】was not常简略为wasn’t; were not常简略为weren’t

  e) 过去进行时的用法:过去进行时表示过去某一时刻或某一段时间正在进行的动作。这一特定的过去时间,f) 除有上,g) 下文暗示以外,h) 一般用时间状语来表示

  not …until直到…才。表示动作在某时之前尚未开始,直到此时动作才开始。not…until可以用after或when来代替,但主句谓语动词要用肯定形式。Until为连词时后接时间状语从句,until作介词时,后面接表示时间的名词。Until 用于肯定句多表示动作或状态一直延续到until所表示的时间为止,意思为“直到…” from..till…中till往往表示不太具体的时间。From …to…或from…until常用来表示具体的时间。

  find it…to do,it在此句中为形式宾语代表动词不定式,动词不定式为真正的宾语,常用于这种用法的动词有find, feel, think, make等。

  “疑问词+不定式“结构相当于一个名词性从句,常常可用同等成分的从句代替。改写时,只需在疑问词后面加一个适当的主语(这个主语一般与主句的主语一致),并将不定式改成适当形式的谓语即可。如,Where to go is still a question.= Where we should go is still a question.

  when 与while:when连接的状语从句是个特殊句型,“前一个分句(谓语动词用过去进行时)+when(作并列连词,意思为“这时,突然”)+后一个分句(谓语动词用一般过去时)”表示在前一个动作正在进行的过程中突然发生了后一个动作, when强调动作的突然性,when后面的动词为非延续性动词;while表示“在….过程中”,强调在一段时间内,所以while引导的从句中的谓语动词必须为延续性动词。在状语从句中,若从句放在句首时,应用逗号与主句隔开。

  感叹句的构成:What +a/an+形容词+单数名词+主语+谓语!What a good book it is!

  What+形容词+复数可数名词+主语+谓语!What easy questions they are!

  What+形容词+不可数名词+主语+谓语!What cold weather it is!

  How+形容词+主语+be动词!How nice the watch is!

  How +副词+主语+谓语!How hard they are working!

  8.take place, happen“发生”:take place指“发生事先计划或预想到的事物”;happen指“一切客观事情或情况的偶然或未能预见地发生”。两者都是不及物动词或短语,后面不能跟宾语,也不能用于被动语态;happen的意义很广泛,而take place 仅用于历史上的事件,集会等,是先行布置而后发生或举行的事件,它不用于地震等自然界的现象。

  happen to do 巧遇 sth happens to sb某人遭遇某事

  9.不定代词all, both, each,every与not连用时,只表示部分否定,在否定句中用and连接两个宾语,表语,定语,状语时,只表示部分否定,并且否定 and后面的部分;如用or连接句中两个部分,则表示全部否定。如,She isn’t a bright and beautiful girl.她并不是一个既聪明又漂亮的女孩。(部分否定) She isn’t a bright or beautiful girl.她是一个既不聪明又不漂亮的女孩。(全部否定)。 www.kgf8.com

  四、重点练习

  一、按要求改写句子,每空一词

  1、I made a model house, She helped me.(合并成一句)

  She helped a model house.

  2、Which do you prefer, the big one or the small one?(保持原句意思)

  Which , the big one or the small one?

  3、There is a lot of traffic on the street.(改为否定句)

  traffic on the street.

  4、The nearest shopping center is only 800 meters away.(就划线部分提问)

  is the nearest shopping center?

  5、Don’t eat or drink in the classroom.(保持原句意思)

  eat or drink in the classroom.

  6、This sign tells us to turn left.(就划线部分提问)

  this sign ?

  7、At school we have rules to keep us safe.(就划线部分提问)

  have rules at school?

  8、Let’s go to see the film. (就划线部分提问)

  Let’s go to see the film, ?

  9、I go to the Children’s Place once a week. (就划线部分提问)

  do you go to the Children’s Place?

  10、The MP4 player cost 600 yuan.(对划线部分提问)

  the MP4 player ?

  11、The flowers over there look nice.(改为反问疑问句)

  The flowers over there look nice, ?

  12、We often take the underground to go to school.(划线提问)

  you often go to school?

  13、Do you live in the city? Do you live in the countryside?(合并成一句)

  Do you live the city the countryside?

  14、We are going to see a film this Monday.(就划线部分提问)

  going this Monday?

  15、If you want to stay healthy, you should go to bed early. (保持原句意思)

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