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九年级上学期英语知识点

时间:2021-12-28 10:10:39 英语 我要投稿
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九年级上学期英语知识点

  学习资料涵盖各学科分类和各类其它学习使用的资料,如:图书书籍,学习课件,视频教程,课后答案等,以下是小编收集整理的九年级上学期英语知识点,欢迎大家借鉴与参考,希望对大家有所帮助。

九年级上学期英语知识点

  疑问词是疑问代词“who, whom, what, which, whose”和疑问副词“when, where, how, why ”。此外,连接词“whether”也适用。

  “疑问词+不定式动词”结构有何功用呢?其主要功用有下列五种:

  ⑴当主语,如:

  When to hold the meeting has not yet been decided.

  Where to live is a problem.

  How to cope with the rising cost of living becomes a daily discussion topic.

  ⑵当宾语,如:

  We must know what to say at a meeting.

  He could not tell whom to trust.

  Do you know how to play bridge?

  ⑶当补足语,如:

  The problem is where to find the financial aid.

  The question is who to elect.

  ⑷当名词同位语,如:

  Tom had no idea which book to read first.

  Do you have a rough impression how to do it?

  ⑸当宾语补足语,如:

  Jim is not sure whose to choose.

  Mary and John are not certain whether to get married or not.

  适用于“疑问词+不定式动词”的动词包括:“know, see, decide, tell, ask, consider, discover, explain, forget, guess, hear, imagine, inquire, learn, remember, think, wonder, understand”等。

  有点值得特别注意的是:当这结构当宾语时,它的作用等于名词分句,例如:

  I could not decide which dictonary to buy. / I could not decide which dictionary I should buy.

  Jack did not know where to find such a good teacher./ Jack did not know where he could find such a good teacher.

  有些动词,如“ask, show, tell, advise, inform, teach”等,可以先有个宾语,然后才接着加上适当的“疑问词+不定式动词” 结构。例如:

  The chief technician showed the apprentice how to repair the machine.

  Have you told him where to get the application form?

  综上所述,可见“疑问词+不定式动词”结构是个形象清新,既容易用又不容易出错的特别结构,可以多多运用。

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