以前 → ☊ 
trước khi cho đến khi 
until 
I see her before she sees me. ☊ 
Tôi thấy cô ấy trước khi cô ấy thấy tôi. ☊ Conjunctions We say goodbye before going to Vietnam. ☊ Chúng tôi nói tạm biệt trước khi đi Việt Nam. ☊ Conjunctions I do not wear the hat before wearing the shoes. ☊ Tôi không đội mũ trước khi mang giày. ☊ Prepositions 1 The mathematician wears glasses before working. ☊ Nhà toán học mang kính trước khi làm việc. ☊ Objects 2 Yes, before the summer holidays begin. Vâng, còn trước khi kỳ nghỉ hè bắt đầu. * 096 Repair the roof before the winter begins. Hãy sửa chữa lại mái nhà, trước khi mùa đông bắt đầu. * 096 Wash your hands before you sit at the table. Hãy rửa tay, trước khi bạn ngồi vào bàn ăn. * 096 Close the window before you go out. Hãy đóng cửa sổ, trước khi bạn đi ra ngoài. * 096 like: Trước khi → →
premenstrual syndrome ☊ hội chứng trước khi hành kinh ☊ 
die Kündigungsfrist ☊ thời hạn quy ước trước khi chấm dứt hợp đồng (lao động) ☊ 
☊ Der Flug könnte sich verzögern, aber Sie sollten eine Stunde vor Abflug einchecken. ☊ Chuyến bay có thế bị trễ,nhưng anh vẫn nên làm thủ tục một tiếng trước khi cất cánh. ☊ (Lektion 20, Nr. 245) Tri lief durch die ganze Stadt, bevor er die Adresse des Juweliers fand. ☊ Tri dạo quanh toàn bộ thành phố, trước khi anh ấy tìm thấy địa chỉ cửa tiệm kim hoàn. ☊ (Lektion 26, Nr. 326) Sie möchten sich eine Stunde, bevor die Party beginnt, in einem Restaurant treffen. ☊ Họ muốn gặp nhau ở nhà hàng một tiếng trước khi bữa tiệc bắt đầu. ☊ (Lektion 31, Nr. 395) Vor dem Umzug planen sie die Ausstattung der Zimmer und renovieren das Bad. ☊ Trước khi chuyển nhà họ lập kế hoạch cho việc trang hoàng những căn phòng và sữa chữa nhà tắm. ☊ (Lektion 45, Nr. 643) Bevor du weiter darüber nachdenkst, hilf mir lieber. ☊ Trước khi anh tiếp tục nghĩ về việc đó, tốt hơn là hãy giúp em. ☊ (Lektion 46, Nr. 659) Sie haben viel trainiert, um einen Misserfolg zu verhindern. ☊ Trước khi bắt đầu họ đã tập rất nhiều để tránh sự thất bại. ☊ (Lektion 49, Nr. 694) Vor dem Schlafengehen ☊ Trước khi đi ngủ ☊ (Lektion 54, Nr. 758) Immer jammerst du vor dem Einschlafen. ☊ Anh luôn than phiền trước khi ngủ. ☊ (Lektion 54, Nr. 772) Ehe ich Ihnen die Details vorstelle, möchte ich Ihnen einen kurzen Überblick über die wesentlichen Punkte geben. ☊ Trước khi đi vào nội dung chi tiết, tôi muốn cung cấp cho quy vị một cái nhìn tổng quát về những điểm chính. ☊ (Lektion 114, Nr. 2096) Ich bin dafür zuständig die Software zu testen, bevor sie an den Kunden ausgeliefert wird. ☊ Tôi chịu trách nhiệm việc chạy thử phần mềm, trước khi nó được giao cho khách hành. ☊ (Lektion 116, Nr. 2172) Take out accident insurance before you go on your trip. ☊ accident ☊
She wanted to put her affairs in order before she died. ☊ affair ☊
I've told you before—leave my things alone! ☊ leave/let sth alone ☊
She wasn't anybody before she got that job. ☊ anybody ☊
arrangement with sb (to do sth): You can cash cheques here by prior arrangement with the bank. ☊ arrangement ☊
He likes to have a mug of cocoa before bed (= before going to bed). ☊ bed ☊
Leave your keys at reception before departure. ☊ before ☊
Something ought to have been done before now. ☊ before ☊
Turn left just before (= before you reach) the bank. ☊ before ☊
Your name is before mine on the list. ☊ before ☊
Do it before you forget. ☊ before ☊
Did she leave a message before she went? ☊ before ☊
Before I made a decision, I thought carefully about it. ☊ before ☊
It may be many years before the situation improves. ☊ before ☊
Put that away before it gets broken. ☊ before ☊
He began as an actor, before starting to direct films. ☊ begin ☊
He wrote his best songs before he was 25. ☊ best ☊
Greg thought for a bit before answering. ☊ bit ☊
They had escaped to America shortly before war broke out in 1939. ☊ break out ☊
We had to stop for breath before we got to the top. ☊ breath ☊
He breathed deeply before speaking again. ☊ breathe ☊
I could drive a car before I left school. ☊ can ☊
Don't forget to cancel the newspaper (= arrange for it not to be delivered) before going away. ☊ cancel ☊
I'm very careful about washing my hands before eating (= I make sure I do it). ☊ careful ☊
charge sth: Before use, the battery must be charged. ☊ charge ☊
Check the oil and water before setting off. ☊ check ☊
Check your work before handing it in. ☊ check ☊
Please check in at least an hour before departure. ☊ check in (at...) ☊
clear sth/sb: I had cleared my desk before I left. ☊ clear ☊
It was several hours before the road was cleared after the accident. ☊ clear ☊
Borrowers should think carefully before committing themselves to taking out a loan. ☊ commit ☊
You should consider other people before you act. ☊ consider ☊
Our letters must have crossed in the mail (= each was sent before the other was received). ☊ cross ☊
I need to pay off all my debts before I leave the country. ☊ debt ☊
Flights should be confirmed 48 hours before departure. ☊ departure ☊
We need more time to see how things develop before we take action. ☊ develop ☊
Save the document before closing. ☊ document ☊
Knock before you enter. ☊ enter ☊
We'll have to leave fairly soon (= before very long). ☊ fairly ☊
Before I forget, there was a call from Italy for you. ☊ forget ☊
It was several weeks before he was completely free of pain. ☊ free ☊
Certain formalities have to be gone through before you can emigrate. ☊ go through sth ☊
Go over your work before you hand it in. ☊ go over sth ☊
Let's grab a sandwich before we go. ☊ grab ☊
They are demanding certain guarantees before they sign the treaty. ☊ guarantee ☊
We thought long and hard before deciding to move house. ☊ hard ☊
Had they left before you got there? ☊ have ☊
I wish you'd use your head (= think carefully before doing or saying sth). ☊ head ☊
Your (very) good health! (= said before drinking alcohol to express good wishes for sb's health and happiness) ☊ health ☊
Test the heat of the water before getting in. ☊ heat ☊
You may find it helpful to read this before making any decisions. ☊ helpful ☊
She hesitated before replying. ☊ hesitate ☊
The area was inhabited long before the dawn of recorded history (= before people wrote about events). ☊ history ☊
It would be a good idea to call before we leave. ☊ idea ☊
Passengers were asked to identify their own suitcases before they were put on the plane. ☊ identify ☊
He refused to comment before he had seen all the relevant information. ☊ information ☊
Always read the instructions before you start. ☊ instruction ☊
Buy now before it's too late. ☊ be too late ☊
lay A (on/over B): Before they started they laid newspaper on the floor. ☊ lay ☊
Look left and right before you cross the road. ☊ left ☊
It was an hour before the lights came on again. ☊ light ☊
Check your car before you drive to make sure that your lights are working. ☊ light ☊
We saw a load of houses before we bought this one. ☊ load ☊
There was a long silence before she spoke. ☊ long ☊
He stared at them for the longest time (= for a very long time) before answering. ☊ long ☊
It wasn't long before she had persuaded him (= it only took a short time). ☊ long ☊
She looked through her notes before the exam. ☊ look through sth ☊
With (any) luck, we'll be home before dark. ☊ luck ☊
You're meant to (= you are supposed to) pay before you go in. ☊ mean ☊
I could not have complete peace of mind before they returned. ☊ mind ☊
He thought for a moment before replying. ☊ moment ☊
It will be months before we get the results. ☊ month ☊
Wait until he's in a better mood before you ask him. ☊ mood ☊
Even after years as a singer, he still suffers from nerves before a performance. ☊ nerve ☊
I'd like a second opinion (= advice from another person) before I make a decision. ☊ opinion ☊
Get your ideas into some sort of order before beginning to write. ☊ order ☊
There was a long pause before she answered. ☊ pause ☊
Perhaps you'd like to have a wash before the others arrive. ☊ perhaps ☊
Check the terms of the policy before you sign. ☊ policy ☊
They posed briefly for photographs before driving off. ☊ pose ☊
program sth (to do sth): The computer is programmed to warn users before information is deleted. ☊ program ☊
We should have had a proper discussion before voting. ☊ proper ☊
Put that knife down before you hurt somebody! ☊ put sth down ☊
She put the phone down on me (= ended the call before I had finished speaking). ☊ put sth down ☊
It's merely a question of time before the business collapses. ☊ just/merely/only a question of (sth/doing sth) ☊
Some children can read and write before they go to school. ☊ read ☊
recommend (sb) doing sth: He recommended reading the book before seeing the movie. ☊ recommend ☊
record sb/sth doing sth: He recorded the class rehearsing before the performance. ☊ record ☊
The lights (= traffic lights) changed to red before I could get across. ☊ red ☊
Before I decide, I need time to reflect. ☊ reflect ☊
remember doing sth: Do you remember switching the lights off before we came out? ☊ remember ☊
require doing sth: Lentils do not require soaking before cooking. ☊ require ☊
She had been reviewing the previous week on her way home. ☊ review ☊
Review your work before you turn it in. ☊ review ☊
He made some minor revisions to the report before printing it out. ☊ revision ☊
Try and get rid of your visitors before I get there. ☊ get rid of sb/sth ☊
rub sth/yourself with sth: Rub the surface with sandpaper before painting. ☊ rub ☊
Rub salt over the fish before cooking. ☊ rub ☊
I often go running before work. ☊ run ☊
They reached safety seconds before the building was engulfed in flames. ☊ safety ☊
Make sure you've signed the cheque before sealing the envelope. ☊ seal ☊
He had to settle his affairs (= arrange all his personal business) in Paris before he could return home. ☊ settle ☊
shake sb/sth: Shake the bottle well before use. ☊ shake ☊
Give the bottle a good shake before opening. ☊ shake ☊
There should be plenty of time to go shopping before we leave New York. ☊ shop ☊
I saw him shortly before he died. ☊ shortly ☊
We should arrive before dark. ☊ should ☊
Did you signal before you turned right? ☊ signal ☊
It is significant that he changed his will only days before his death. ☊ significant ☊
She slipped out of the house before the others were awake. ☊ slip ☊
start sth (as sth): He started life as a teacher before turning to journalism. ☊ start ☊
Stir the paint before you use it. ☊ stir ☊
It was many years before the full story was made public. ☊ story ☊
struggle (with sb/sth): Lisa struggled with her conscience before talking to the police. ☊ struggle ☊
study sth: We will study the report carefully before making a decision. ☊ study ☊
Accountants were boring. Such (= that) was her opinion before meeting Ian! ☊ such ☊
It's surely only a matter of time before he is found, isn't it? ☊ surely ☊
He surveyed himself in the mirror before going out. ☊ survey ☊
swallow (sth): Always chew food well before swallowing it. ☊ swallow ☊
That was in the days before electricity was available at the flick of a switch. ☊ switch ☊
He taught for several years before becoming a writer. ☊ teach ☊
test (sth): We test your English before deciding which class to put you in. ☊ test ☊
If anyone comes in before I get back, ask them to wait. ☊ them ☊
We lived in France and then Italy before coming back to England. ☊ then ☊
Think things over before you decide. ☊ thing ☊
Let me think (= give me time before I answer). ☊ think ☊
Wash the fruit thoroughly before use. ☊ thoroughly ☊
I tidied up the report before handing it in. ☊ tidy sth up ☊
Get all the ingredients together before you start cooking. ☊ together ☊
Turn the sweater inside out before you wash it. ☊ turn ☊
Please turn the television off before you go to bed. ☊ turn sth off ☊
Wait until the dough doubles in volume before kneading it again. ☊ volume ☊
wait for sb/sth to do sth: We're waiting for the rain to stop before we go out. ☊ wait ☊
Wait for the warmer weather before putting the plants in the garden. ☊ warm ☊
Wash the fruit thoroughly before eating. ☊ wash ☊
I washed and changed before going out. ☊ wash ☊
Wash that mud off your boots before you come in. ☊ wash sth off (sth) ☊
Look both ways (= look left and right) before crossing the road. ☊ way ☊
The surface must be well prepared before you start to paint. ☊ well ☊
He scored the winning goal just seconds before the final whistle. ☊ whistle ☊
It is treated with acid before being analysed. ☊ with ☊
Without wanting to criticize, I think you could have done better. (= used before you make a critical comment) ☊ without ☊
It's worth making an appointment before you go. ☊ worth ☊
wrap A (up) in B: Wrap the meat in foil before you cook it. ☊ wrap ☊
Write down the address before you forget it. ☊ write sth down ☊