大家都说could, might, would, should 为 can, may, will, shall 的过去式,但在很多时候并不表过去,而是“更加委婉”,如you can't / couldn't criticize him. 你不该批评他。can/could i help you? 有什么能帮你的。请问我想表达“过去你不该批评他”,“过去有什么能帮你”还是用could吗?
过去你不该批评他:You shouldn't have criticized him.
过去有什么能帮你吗?(这个汉语句子本来就不够通顺)。Was there anything that I could have helped to do?
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