bất tỉnh không có ý thức không biết rõ 
unconscious 
They do not know how to use it. ☊ 
Họ không biết dùng nó. ☊ Verbs 1 I do not know that they are famous people. ☊ Tôi không biết họ là người nổi tiếng. ☊ Adjectives 1 I do not know their profession. ☊ Tôi không biết nghề nghiệp của họ. ☊ Jobs 1 You are crying but I do not know. ☊ Bạn đang khóc vậy mà tôi không biết. ☊ Conjunctions 2 They do not know the hotel's address. ☊ Họ không biết cái địa chỉ của khách sạn. ☊ Places You are an American citizen and you do not know the name of the president. ☊ Bạn là một công dân Mỹ và bạn không biết tên của Tổng thống. ☊ Politics She does not know how to use the computer. ☊ Họ không biết sử dụng máy tính như thế nào. ☊ Verbs 5 I don’t remember the name right now. Bây giờ tôi không biết cái đó gọi là gì. * 025 I don’t know if he loves me. Tôi không biết liệu anh ấy có yêu tôi không. * 095 I don’t know if he’ll come back. Tôi không biết liệu anh ấy có trở lại không. * 095 I don’t know if he’ll call me. Tôi không biết liệu anh ấy có gọi cho tôi không. * 095 I can neither play the piano nor the guitar. Tôi không biết chơi dương cầm mà cũng không biết chơi đàn ghi ta. * 100 I can neither waltz nor do the samba. Tôi không biết nhảy điệu vanxơ mà cũng không biết nhảy điệu xam ba. * 100 like: không biết → →
it seems he does not know anything about that matter at all ☊ như tuồng anh ta không biết gì về việc ấy cả ☊ 
unverschämt ☊ không biết ngượng, trơ trẽn ☊ 
厚颜无耻的 ☊ hòu yán wúchǐ de unverschämt ☊ không biết ngượng, trơ trẽn ☊ ☊ Er weiß nicht, welchen Treibstoff sein Auto benötigt. ☊ Anh không biết là ô-tô cần loại xăng nào. ☊ (Lektion 19, Nr. 215) Ich weiß es nicht genau. ☊ Tôi không biết rõ. ☊ (Lektion 19, Nr. 222) Er weiß nicht, wie lange er bei seinem Bruder bleiben möchte. ☊ Anh ấy không biết là mình sẽ ở chỗ anh trai bao lâu. ☊ (Lektion 20, Nr. 229) Ich kann nicht entscheiden, was ich mitnehmen soll. ☊ Anh không biết là nên mang theo đồ gì. ☊ (Lektion 24, Nr. 300) Ich kenne die Richtung nicht. ☊ Tôi không biết hướng đó. ☊ (Lektion 28, Nr. 363) Tri möchte sie in ihrer neuen Wohnung besuchen, aber er kennt den Weg nicht. ☊ Tri muốn thăm căn phòng mới của Trang, nhưng anh ấy không biết đường. ☊ (Lektion 37, Nr. 520) Ich muss zugeben, das weiß ich nicht. ☊ Anh phải tự thừa nhận, anh cũng không biết. ☊ (Lektion 65, Nr. 932) Ich bin mir nicht sicher, wie ich in diesem Fall entscheiden soll. Ist etwas Vergleichbares schon einmal vorgekommen? ☊ Tôi không biết nên quyết định thế nào trong trường hợp này. Đã có một trường hợp tương tự nào xảy ra chưa? ☊ (Lektion 99, Nr. 1618) Ich soll mehr Informationen über diesen Fall suchen, aber ich komme mit meiner Recherche nicht weiter. Hast du einen guten Rat für mich? ☊ Tôi rất cần thêm thông tin về trường hợp này nhưng không biết tiếp tục tra cứu thế nào? Anh / Chị có lời khuyên hữu ích nào không? ☊ (Lektion 99, Nr. 1638) We don't know whether he's alive or dead. ☊ alive ☊
They appeared not to know what was happening. ☊ appear ☊
I haven't known him as long as you (= as you have known him). ☊ as ☊
It's my birthday. As if you didn't know! ☊ as if/as though ☊
I didn't know at the time of writing (= when I wrote). ☊ at ☊
The world of Disney is a magical experience that knows no age barriers. ☊ barrier ☊
beat sb why, how, etc...: It beats me (= I don't know) why he did it. ☊ beat ☊
She doesn't know how to behave in public. ☊ behave ☊
I don't know why I bother! Nobody ever listens! ☊ bother ☊
I don't know why you bother with that crowd (= why you spend time with them). ☊ bother ☊
I don't know anyone called Scott. ☊ called ☊
She has no clothes sense (= she does not know what clothes look attractive). ☊ clothes ☊
She hadn't read the letter and so was unaware of its contents. ☊ content ☊
She didn't know what life in a foreign country would be like. ☊ country ☊
Society does not know how to deal with hardened criminals (= people who regularly commit crimes and are not sorry for what they do). ☊ criminal ☊
'Nicky won't find out, will she?' 'Oh, no, there's no danger of that.' ☊ danger ☊
I have to say in her defence that she knew nothing about it beforehand. ☊ defence ☊
I don't know if we can help—it all depends. ☊ that depends, it (all) depends ☊
Her paintings reveal hidden depths (= unknown and interesting things about her character). ☊ depth ☊
I lost all sense of direction (= I didn't know which way to go). ☊ direction ☊
It is not known what causes the disease. ☊ disease ☊
I don't know what to do with (= how to use) all the food that's left over. ☊ do sth with sb/sth ☊
I was unaware of his existence until today. ☊ existence ☊
Most of the 'don't knows' in the opinion polls came down in favour of (= eventually chose to support) the Democrats. ☊ in favour (of sb/sth) ☊
'How big was the bomb, if it did all that damage?' 'I don't know. Not my field' (= that is not one of the subjects I know about). ☊ field ☊
I don't know how he's going to get on in life. ☊ get on ☊
grow sth: I didn't know they grew rice in France. ☊ grow ☊
I don't really know. I'm just guessing. ☊ guess ☊
I don't know how this happened. ☊ happen ☊
I always end up having an argument with her, I don't know why, I just can't help it. ☊ sb can (not) help (doing) sth, sb can not help but do sth ☊
He did not know how he ought to behave. ☊ how ☊
I didn't know how much to bring. ☊ how ☊
'What's she talking about?' 'I've no idea.' ☊ have no idea, not have the faintest, first, etc. idea ☊
For years we had little knowledge of what life was like inside China. ☊ inside ☊
interesting (that...): I find it interesting that she claims not to know him. ☊ interesting ☊
interpret sth as sth: I didn't know whether to interpret her silence as acceptance or refusal. ☊ interpret ☊
The last singer was the best—not that I'm any judge (= I do not know much about the subject). ☊ judge ☊
I don't know anyone in Oxford. ☊ know ☊
I don't know that I can finish it by next week. ☊ know ☊
'She's the worst player in the team.' 'Oh, I don't know (= I am not sure that I agree) —she played well yesterday.' ☊ know ☊
I didn't know what he was talking about. ☊ know ☊
'What's the answer?' 'I don't know.' ☊ know ☊
I don't know about you, but I'm ready for something to eat. ☊ know ☊
'Isn't that his car?' 'I wouldn't know./How should I know? ' (= I don't know and I am not the person you should ask.) ☊ know ☊
I don't know if I can come, but I'll let you know tomorrow. ☊ let sb know ☊
likely (that...): It's more than likely that the thieves don't know how much it is worth. ☊ likely ☊
Little did I know that this spelled the end of my career. ☊ little ☊
He's a lost soul (= a person who does not seem to know what to do, and seems unhappy). ☊ lost ☊
I don't know how I made it through the week. ☊ make it ☊
I don't know how she manages on her own with four kids. ☊ manage ☊
I don't know exactly how we'll manage it, but we will, somehow. ☊ manage ☊
'But Pete doesn't know we're here!' 'That's what I mean! (= that's what I have been trying to tell you.)' ☊ mean ☊
'Honesty'? He doesn't know the meaning of the word! ☊ meaning ☊
I've no idea how her mind works! ☊ mind ☊
I don't know what I'm going to do yet—I've just this minute found out. ☊ this minute ☊
He wrote the music but I don't know who wrote the words. ☊ music ☊
a mystery tour (= when you do not know where you are going) ☊ mystery ☊
His past is shrouded in mystery (= not much is known about it). ☊ mystery ☊
'I don't know.' 'Me neither.' ☊ neither ☊
I neither knew nor cared what had happened to him. ☊ neither ☊
I never knew (= didn't know until now) you had a twin sister. ☊ never ☊
I don't know if he's telling the truth or not. ☊ not ☊
Normally, the letter would not have come to my notice (= I would not have known about it). ☊ notice ☊
He was not aware that he had committed an offence. ☊ offence ☊
I don't know her well, I've only met her once or twice. ☊ once or twice ☊
We didn't know how we would cope once the money had gone. ☊ once ☊
I don't know any French people other than you. ☊ other than ☊
He's always playing a part (= pretending to be sth that he is not). ☊ part ☊
We don't know anything about his past. ☊ past ☊
The verdict was murder by a person or persons unknown. ☊ person ☊
I don't know how to make polite conversation. ☊ polite ☊
I don't know how she puts up with him. ☊ put up with sb/sth ☊
I don't know much about it, so I don't feel qualified to comment. ☊ qualified ☊
I don't quite know what to do next. ☊ quite ☊
For some reason (= one that I don't know or don't understand) we all have to come in early tomorrow. ☊ reason ☊
He has no idea how to run a business. ☊ run ☊
'When will it be finished?' 'I couldn't say (= I don't know).' ☊ say ☊
I didn't know you were a secret football fan. ☊ secret ☊
'Is he going to get better?' 'I don't know, we'll just have to wait and see.' ☊ see ☊
'Will you be able to help us?' 'I don't know, I'll have to see.' ☊ see ☊
Alex doesn't have any dress sense (= does not know which clothes look attractive). ☊ sense ☊
She shrugged her shoulders (= showing that she didn't know or care). ☊ shoulder ☊
His name is Alan something (= I don't know his other name). ☊ something ☊
state that...: He stated categorically that he knew nothing about the deal. ☊ state ☊
+ adv./prep.: I don't know why they stay together (= remain married or in a relationship). ☊ stay ☊
She criticizes everyone and the trouble is, she doesn't know when to stop. ☊ stop ☊
Sorry, I don't know where the bank is. I'm a stranger here myself. ☊ stranger ☊
I don't know how you can eat that stuff! ☊ stuff ☊
I don't know what you're talking about (= used to say that you did not do sth that sb has accused you of). ☊ talk ☊
There are a lot of things she doesn't know about me. ☊ thing ☊
I don't know what to say. ☊ to ☊
I don't know him well; I've only met him twice. ☊ twice ☊
He comes from Boula, wherever that may be (= I don't know where it is). ☊ wherever ☊
Don't you know it's rude to whisper? ☊ whisper ☊
There were a whole lot of people I didn't know. ☊ a whole lot (of sth) ☊
It must be worrying for you not to know where he is. ☊ worrying ☊
Rightly or wrongly, they felt they should have been better informed (= I do not know whether they were right to feel this way). ☊ wrongly ☊