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x-ace 发表于 2009-12-25 11:13

助动词should,would的用法

1)should无词义,只是shall的过去形式,与动词原形构成过去将来时,只用于第一人称,例如:
  I telephoned him yesterday to ask what I should do next week.
  我昨天给他打电话,问他我下周干什么。

比较:
  "What shall I do next week?" I asked.
  "我下周干什么?"我问道。(可以说,shall变成间接引语时,变成了should。)

2) would也无词义,是will的过去形式,与动词原形构成过去将来时,用于第二、第三人称,例如:
   He said he would come.  他说他要来。
比较:
   "I will go," he said. 他说:"我要去那儿。"
   变成间接引语,就成了:
   He said he would come. 
   原来的will变成would,go变成了come.。

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