You _________ be right, but I don’t think you are.A．canB．couldC．mustD．should
题型：不详难度：来源：
You _________ be right, but I don’t think you are.| A．can | B．could | C．must | D．should |
|
答案
| B |
解析
| 从语境上看，C、D不宜选，在剩下的A和B中，许多同学想当然地选了A，认为整个句子为现在时态，所以选can，而不选过去式 could，但是最佳答案却是B而不是A。按照英语语法，情态动词can 用于推测表示可能性时，通常只用于否定句或疑问句中，而不用于肯定句中；但 could 用于表推测时，却不仅可用于否定句和疑问句，也可用于肯定句，且此时的 could 并不是 can 的过去式，与 can 也没有时间上的差别，只是 could 比 can语气更委婉，所以答案选B。注：can 在以下特殊情况下，也可用于肯定句。一是表示抽象的可能性，即从理论上或逻辑上分析是可能的，但是实际上未必会发生。如：Anyone can make mistakes. 任何人都可能会犯错误。二是后接“be (get, seem, become)＋形容词”，表示“有时会”、“时常会”等。如：My father can be very unreasonable. 我父亲有时候很不讲道理。 |
举一反三
Mike is often absent from class.” “Tell him he _________ answer for it if he goes on behaving like that.”| A．shall | B．will | C．would | D．can |
|
--- I hear you have written a novel.
--- Yes, the book ______ come out in a month or so.| A．can | B．must | C．should | D．would |
|
To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.| A．could | B．might | C．would | D．must |
|
It’s unbelievable that such a small girl ____ have so much knowledge about computer.| A．could | B．would | C．should | D．might |
|
It was playing computer games that cost the boy plenty of time he ____ doing his lessons.| A．might have spent | B．ought to have spent | C．must have spent | D．could have spent |
|
最新试题
热门考点