should 用法讲与练之二
用于表语从句中)
5. 用在 It is / was necessary/ important/ strange/ incredible 或 It is a pity/ a shame/ no wonder 之后由 that 引导的主语从句中, should 有应该、必须、竟然、居然之意。例如:
It is necessary that he (should) be sent there at once. 有必要马上派他到那里去。
It is strange that the wheel should turn so slowly.
真奇怪,这个轮子竟然转动得如此之慢。
It is a great pity/ shame/ that he should be so conceited.
真遗憾,他竟会这样自高自大。
九 . should have + - ed 分词结构用来表达下述意义:
1. 表示应该已经,本来应该,即过去该做某事但实际没有做,其否定式 shouldn't have + - ed 分词意为本来不应该。例如:
These cells should have been kept in somedry places. 这些电池本来应该放(保存)在干燥的地方。(但实际上没有把它们放在干燥的地方。)
You shouldn't have dept those cells in the damp place. 你本来不该把那些电池放在潮湿的地方。(但实际上已经把它们放到潮湿的地方了。)
2. 表示(估计)应该已经,大概已经,即对过去情况的推测。例如:
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