1.may基本含义与用法
(1)(表准许、请求)可以
(2)(表愿望、祝福)但愿;祝……。此时,句子要用倒装语序
(3)(用于目的状语从句中)为了;为了能够
(4)(用于让步状语从句中)即使;无论
(5)构成句型:may/ might as well do sth. “还是做某事的好;不妨去做某事”
【注意】情态动词完成式的用法:表示已经发生的情况,may/ might have +过去分词,表示对已发生的事情做不肯定、可能性很小的推测,或事实上根本没发生,译为“也许……”。例如:At Florida Power’s Crystal River plant, a potentially serious leakage of radioactive water may have been unknowingly caused by an electrician.
表示虚拟语气,may/ might have + 过去分词,表示过去可以做但实际未做,译为“(那样)也许会……”。例如: It might have been better to include more punchy statistics and photos of equipment in the introduction to further assist first-time office automation managers.
2. must基本含义与用法
(1)(表义务、必要性、命令)必须,得,要,mustn’t表“禁止、不准”
(2)(表必然性)必定
(3)(表固执、不满等)偏偏;硬要;偏要,例如:If you must know,I’m going to help him look for an apartment.
【注意】情态动词完成式的用法:must have +过去分词,表示对已发生情况的肯定推测,译为“(昨天)一定……”。例如: My pain must have been apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”
(1)(表义务、必要性、命令)必须,得,要,mustn’t表“禁止、不准”、(2)(表必然性)必定、(3)(表固执、不满等)偏偏;硬要;偏要,例如:If you must know,I’m going to help him look for an apartment.
【注意】情态动词完成式的用法:must have +过去分词,表示对已发生情况的肯定推测,译为“(昨天)一定……”。例如: My pain must have been apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”
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