unless 的英语意思
unlessunless /ʌnˈles, ən-/ conjunction 
查看全部语言翻译1used to say that something will happen or be true if something else does not happen or is not true用于表示若某事未发生或不成立，则另一件事将会发生或成立: 
Unless some extra money is found, the theatre will close.除非能筹到额外资金，否则这家剧院将关闭。 I think you should complain – unless, of course, you are happy with the way things are.我认为你应该投诉——当然，除非你对现状感到满意。 He won’t go to sleep unless you tell him a story.除非你给他讲个故事，否则他不会入睡。 I can’t leave her unless I know she’s all right.除非我知道她平安无事，否则我无法离开她。► see thesaurus at if2 not unless only if仅当: ‘Will you go with her?’ ‘Not unless she wants me to.’"你会陪她去吗？""除非她希望我去，否则不会。"GRAMMAR: Choosing the right tense语法：选择正确的时态• You use the simple present tense with unless: · Unless the government changes its policy, the economic situation will get worse.• unless 后接一般现在时：· 除非政府改变政策，否则经济形势将会恶化。• Don’t use ‘will’ in the clause after unless. ✗Don’t say: Unless the government will change its policy ...• unless 后面的从句中不使用"will"。✗不要说：Unless the government will change its policy……• You can also use the present perfect tense with unless: · I won’t change anything unless someone has asked me to. ✗Don’t say: unless someone will have asked me to | unless someone will ask me to• unless 后也可接现在完成时：· 除非有人要求我，否则我不会做任何改动。✗不要说：unless someone will have asked me to | unless someone will ask me to• To talk about the past, use the simple past with unless: · Unless the company got a loan, it would go bankrupt.· They threatened to kill him unless he gave them the money. ✗Don’t say: Unless the company would get a loan ...• 谈及过去时，unless 后接一般过去时：· 除非公司获得贷款，否则将面临破产。· 他们威胁说，除非他把钱交出来，否则就杀了他。✗不要说：Unless the company would get a loan……USAGE: Unless, in case, or else用法：Unless、in case 与 or else• You use unless when saying that if something does not happen, something else will happen: · Unless I hear from you (=if I don’t hear from you), I’ll assume everything’s OK.• unless 用于表示若某事未发生则另一件事将发生：· Unless I hear from you（即如果我没有收到你的消息），我就认为一切都好。• You use in case when saying that you do something in order to be prepared if something happens: · Take a sweater in case you get cold.• in case 用于表示为应对某事发生而提前做好准备：· 带上一件毛衣，以防你感到冷。• You use or else when saying that something bad will happen if you do not do something: · You’d better go now, or else you’ll miss the train.• or else 用于表示如果不做某事则将发生不好的事情：· 你最好现在就走，否则你会误了火车。
查看全部语言翻译1used to say that something will happen or be true if something else does not happen or is not true用于表示若某事未发生或不成立，则另一件事将会发生或成立: Unless some extra money is found, the theatre will close.除非能筹到额外资金，否则这家剧院将关闭。 I think you should complain – unless, of course, you are happy with the way things are.我认为你应该投诉——当然，除非你对现状感到满意。 He won’t go to sleep unless you tell him a story.除非你给他讲个故事，否则他不会入睡。 I can’t leave her unless I know she’s all right.除非我知道她平安无事，否则我无法离开她。► see thesaurus at if2 not unless only if仅当: ‘Will you go with her?’ ‘Not unless she wants me to.’"你会陪她去吗？""除非她希望我去，否则不会。"GRAMMAR: Choosing the right tense语法：选择正确的时态• You use the simple present tense with unless: · Unless the government changes its policy, the economic situation will get worse.• unless 后接一般现在时：· 除非政府改变政策，否则经济形势将会恶化。• Don’t use ‘will’ in the clause after unless. ✗Don’t say: Unless the government will change its policy ...• unless 后面的从句中不使用"will"。✗不要说：Unless the government will change its policy……• You can also use the present perfect tense with unless: · I won’t change anything unless someone has asked me to. ✗Don’t say: unless someone will have asked me to | unless someone will ask me to• unless 后也可接现在完成时：· 除非有人要求我，否则我不会做任何改动。✗不要说：unless someone will have asked me to | unless someone will ask me to• To talk about the past, use the simple past with unless: · Unless the company got a loan, it would go bankrupt.· They threatened to kill him unless he gave them the money. ✗Don’t say: Unless the company would get a loan ...• 谈及过去时，unless 后接一般过去时：· 除非公司获得贷款，否则将面临破产。· 他们威胁说，除非他把钱交出来，否则就杀了他。✗不要说：Unless the company would get a loan……USAGE: Unless, in case, or else用法：Unless、in case 与 or else• You use unless when saying that if something does not happen, something else will happen: · Unless I hear from you (=if I don’t hear from you), I’ll assume everything’s OK.• unless 用于表示若某事未发生则另一件事将发生：· Unless I hear from you（即如果我没有收到你的消息），我就认为一切都好。• You use in case when saying that you do something in order to be prepared if something happens: · Take a sweater in case you get cold.• in case 用于表示为应对某事发生而提前做好准备：· 带上一件毛衣，以防你感到冷。• You use or else when saying that something bad will happen if you do not do something: · You’d better go now, or else you’ll miss the train.• or else 用于表示如果不做某事则将发生不好的事情：· 你最好现在就走，否则你会误了火车。