unless

◎ 单词释义

conj.除非；如果不

prep.除 ... 外

除非

如果不

除非在…情况下

若非

要是不

prep.(介词)

除…外

除非

conj.(连词)

除非,如果不 except, in the case that

1. 除非；若不；除非在…的时候
You use unless to introduce the only circumstances in which an event you are mentioning will not take place or in which a statement you are making is not true.

e.g. Unless you are trying to lose weight to please yourself, it's going to be tough to keep your motivation level high...
除非减肥是为了悦已，否则很难保持积极性。
e.g. We cannot understand disease unless we understand the person who has the disease...
若不了解患者我们就不能了解疾病。

Do not confuse unless, except, except for, and besides. Unless is used to introduce the only situation in which something will take place or be true. In the 1940s, unless she wore gloves a woman was not properly dressed... You must not give compliments unless you mean them. You cannot use unless to talk about a situation that results from something not happening. Instead you use if...not. I'll be glad if she doesn't come. You use except to introduce the only things, situations, people, or ideas that a statement does not apply to. All of his body relaxed except his right hand... Travelling was impossible, except in the cool of the morning. You use except for before something that prevents a statement from completely true. The classrooms were silent, except for the scratching of pens on paper... I had absolutely no friends except for Tom. You use besides to introduce extra things in addition to the ones you are mentioning already. Fruit will give you, besides enjoyment, a source of vitamins. However, note that if you talk about 'the only thing' or 'the only person besides' a particular person or thing, besides means the same as 'apart from'. He was the only person besides Gertrude who talked to Guy.
不要混淆 unless，except，except for 和 besides。unless用于引出某事发生或成立所必需的条件，如：In the 1940s, unless she wore gloves a woman was not properly dressed（在20世纪40年代，女性若不戴手套就算衣着不得体），You must not give compliments unless you mean them（除非出自真心，否则不要随便恭维）。谈论由于某事未发生而导致的情形不能用unless，要用 if...not，如：I'll be glad if she doesn't come（如果她不来我会很高兴的）。except 用于引出陈述中唯一不适用的事物、情形、人或想法，如：All of his body relaxed except his right hand（除了右手以外，他全身都放松了），Travelling was impossible, except in the cool of the morning （除了在凉爽的早晨，其他时候出行都是不可能的）。except for用于引出使其陈述不能完全成立的事物，如：The classrooms were silent, except for the scratching of pens on paper（除了笔在纸上发出的沙沙声，教室一片寂静），I had absolutely no friends except for Tom（除了汤姆，我一个朋友也没有）。besides用于引出已提到事物之外的其他事物，如：Fruit will give you, besides enjoyment, a source of vitamins（水果不但好吃，而且富含维生素）。但应注意，用于谈论除某人或某物之外唯一的人或物时，besides的意思与apart from相同，如：He was the only person besides Gertrude who talked to Guy（除格特鲁德之外，他是唯一跟盖伊说话的人）。

1. 除非,如果不：VB: Visual Basic,编程语言 | unless: 除非,如果不 | resulting: 结果的

2. 如果不,除非：▲university 大学 | unless 如果不,除非 | unlike 不像,和. . . 不同

3. 如果不：rock=岩石; | unless=如果不; | point out=指出;

conj.(连词)

unless所引导的条件状语从句常用一般现在时表示将来意义,主句多用一般将来时。unless在表示“除非”时,如其引导的从句谓语是be,而从句的主语跟主句的主语相同时,从句的主语和be就可省略。有时从句中主语为it时,也可省略it或从句中的有关成分。

在unless引导的肯定形式的条件从句中通常用肯定词,如:already, still, some, too。在unless引导的否定形式的条件从句中通常用否定词。

unless表示条件时后可接现在分词短语。

conj.(连词)

unless, if...not...

二者均可表示“如果不…”。unless不可引导虚拟语气从句; if...not...可用于虚拟语气结构。

☆ 直接源自中古英语的on lesse，意为在极少情况下。

以上就是本站详细整理的词语unless是什么意思的翻译解释，供大家参考一下。