【be的用法】be的用法与作用?

发布时间:2021-03-30 14:29:17

be的用法与作用? 英语

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【答案】 1) be +现在分词,构成进行时态,例如:
  They are having a meeting.他们正在开会.
  English is being more and more important.英语现在越来越重要.
  2) be + 过去分词,构成被动语态,例如:
  The window was broken by Tom..窗户是汤姆打碎的.
  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、未来的计划或安排,例如:
  He is to go to New York next week..他下周要去纽约.
  We are to teach the freshpersons.我们要教新生.
  说明:这种用法也可以说成是一种将来时态表达法.
  b.表示命令,例如:
  You are to explain this.对此你要做出解释.
  He is to e to the office this afternoon.要他今天下午来办公室.
  c.征求意见,例如:
  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,例如:
  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.
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