这里为什么使用would be和could be

来源：百度知道 编辑：UC知道 时间：2024/07/02 12:56:41
Some of the questions had four choices that have the same meaning. Method, way, manner, system would be four words with the same meaning. Some of them had four unrelated choices. For instance, weather, method, love, and result could be used as four unrelated words.
这里为什么使用would be和could be
不能用will be 和can be?

这是过去将来时、
表示发生在过去的将来的事情、
结构 would+动词原形或was/ were going to+动词原形
过去将来时的用法：
1．主句为过去时，宾语从句常表示将要发生的事情。如：
Nobody knew what would happen after a hundred years. 没有人知道一百年之后将会发生什么事。
We didn’t know whether she was going to speak at the meeting. 我们不知道她是否准备在会上发言。
2．在叙述过去的事情或事情发生的经过时，用过去将来时表示在当时看将来会发生的事。如：
t was a Saturday afternoon. A young man named George had just left school. He was going to start to work the following week, so he decided to buy some new clothes and a new pair of shoes.一个星期六的下午，一位名叫乔治的年轻人刚离开学校。因为他准备下周开始工作，所以，决定买些新衣服和一双新鞋子。

因为句子都是用的had 过去时

这段话的整个情景是在过去时的状态下的 因为开头就说 questions had four choices 前后时态要保持一致 所以当用到will和can的时候就也要用它们的过去时 will的过去时和can的过去时 也就是would和could