【创优设计】2018-2019学年译林版高中英语选修7学案:Unit3 Theworldonline SectionⅡ Word版含解析
【创优设计】2018-2019学年译林版高中英语选修7学案:Unit3 Theworldonline SectionⅡ Word版含解析第3页

  English is taught throughout the world.

  世界各地都教英语。

  3)be+动词不定式,可表示下列内容:

  a.表示最近的、未来的计划或安排。

  He is to go to New York next week.

  他下周去纽约。

  We are to teach the freshmen.

  我们将要教大一新生。

  注意:这种用法也可以说成是将来时态的一种表达法。

  b.表示命令。

  You are to explain this.

  对此你要做出解释。

  He is to come to the office this afternoon.

  要他今天下午来办公室。

  c.征求意见。

  How am I to answer him?

  我该怎样答复他?

  Who is to go there?

  谁该去那儿呢?

  d.表示相约,商定。

  We are to meet at the school gate at seven tomorrow morning.

  我们明天早晨7点在校门口集合。

  2.助动词have的用法

  1)have+过去分词,构成完成时态。

  He has left for London.

  他已去了伦敦。

  By the end of last month,they had finished half of their work.

  到上月末为止,他们已经完成了一半的工作。

  2)have+been+现在分词,构成完成进行时。

  I have been studying English for ten years.

  我一直在学英语,已达十年之久。

  3)have+been+过去分词,构成完成时被动语态。

  English has been widely used in many fields for many years.

  多年来,英语已被广泛应用于众多领域。

  3.助动词do 的用法

  1)构成一般疑问句。

  Do you want to pass the exam?

  你想通过考试吗?

  Did you study German?

  你(们)学过德语吗?

  2)do+not 构成否定句。

  I do not want to be criticized.

  我不想挨批评。

  He doesn't like to study.

  他不喜欢学习。

  In the past,many students did not know the importance of English.

  过去,很多学生不知道英语的重要性。

  3)构成否定祈使句。

  Don't go there.

  不要去那里。

  Don't be so absentminded.

  不要这么心不在焉。

注意:构成否定祈使句只用do,不用did和does。