2018-2019学年人教版高一英语必修三专题之 学海探究 学案:Unit2 SectionⅡ
2018-2019学年人教版高一英语必修三专题之 学海探究 学案:Unit2 SectionⅡ第2页

  同义句改写

  (4)I consulted the telephone book for his address.

  I ______ ______ his address ______ the telephone book.

  翻译句子

  (5)He is in consultation and cannot come to the phone.

  ________________________________________________________________________

  2.Grammar 情态动词:ought to/ought not to,have to/don't have to/mustn't/needn't以及情态动词完成式的用法。

  (1)ought to

  A.ought to无人称和时态的变化,其否定式为ought not to/oughtn't to,疑问式为:Ought I/you/he to...?常译作"应该,应当"。语气比should稍重一些。表示有责任、义务等。

  语法填空

  ①我是他的老师,我应该照顾他。

  I'm his teacher.I ought ______(take)care of him.

  ②他们正在上课,你不应该在这里大声吵闹。

  They are having a class.You ______ make such noise here.

  ③-Ought I ______ write to say thank you?

  我应该写信致谢吗?

  -Yes,you ought(to).是的,你应该。

  B.含有ought to的反意疑问句,陈述部分是肯定时,疑问部分用shouldn't/oughtn't+主语。

  ④He ought to know what to do,______ he?

  他应该知道做什么,是吗?

  C.表示推测,多指按照常理的一种推测,意为"按理应该......"。

  翻译句子

  ⑤It is already 9 o'clock;he ought to be in his office now.

  翻译:______________________________________________________

  (2)have to通常指由于客观原因而不得不做某事,意思为"不得不,必须"。

  ⑥There is no bus now.I have to go home on foot.

  现在没车了。我不得不步行回家。

  注意:have to与一般情态动词的不同点

  A.一般情态动词没有人称和数的变化,而且所用的时态也受到一定的限制,而have to有人称和数的变化,可用于多种时态中。

⑦He has to admit the idea of marriage scares him.