英语词汇unless的意思、翻译、用法及例句-英语用法大全

词组	unless
释义	1．unless=if...not，但语气比 if...not 重，如 unless it is fine tomorrow 语气比 if it is not fine tomorrow 重。 2．以 unless 引导的从句里的动词用现在时，不用将来时，如 unless it is fine tomorrow 里用 is，不用 will be。unless you will see him tomorrow 里的 will 表示意志。 3．下面每句里用虚拟现在式，现在远不及用陈述现在式普通： Unless it be (或is) fine tomorrow, we shall not sail. Unless he study (或studies) harder, he will lag behind. Unless she have (或has) already done her best, she does not deserve the prize. 4．unless=if...not，但下面两句意思不同： If he were not my friend, I should not expect his help. （假使他不是我的朋友，我将不期望他的帮助。［他是我的朋友，所以我期望他的帮助。］） Unless he were my friend, I should not expect his help. （除非他是我的朋友，我将不期望他的帮助。［他并不是我的朋友，所以我不期望他的帮助。］） If I were a bird, I could fly 和 Unless I were a bird, I could not fly 都是“我不是鸟，所以我不能飞。”却不可说 Unless I were not a bird, I could fly。但下面每组里的两句意思相同： 5．可以说 You must not use my pen unless writing a letter，但不可说 You must not use my pen unless wiping it afterwards。因为第一句里的 unless writing a letter 等于 unless you are writing a letter，第二句里的 unless wiping it afterwards 等于 unless you are wiping it afterwards，讲不通。第二句里的 unless 该改作 without。 6．unless and until 作 until 解。
随便看	railway rain raise range rank rare rate rather raw re reach reaction read reader readiness ready reason recall receipt receive recent recitation recite reckon recognize

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