指尖链有道词典

before

B 开头单词四级词汇专八核心词高考词汇

音标发音

  • 英式音标 [bɪˈfɔ:(r)]
  • 美式音标 [bɪˈfɔr,-ˈfor]
  • 国际音标 [bi'fɔ:]
  • 英式发音
  • 美式发音

基本解释

  • prep. 在……之前，先于；在……面前；面对（法院、法庭或其他官方机关）并受审；（宁愿……）不愿
  • conj. 在……以前；到……为止；以免，不然；（宁可……而）不愿
  • adv. 以前，过去，已经

同根派生

  • before

用法辨析

    prep. (介词)

  • before可用于表示时间。首先，可以表示“先于，在…以前”，其后可以跟表示具体日期、时间等的名词或数词，也可以跟表示时间或动作的名词。其次，可以表示“在做…之前”，后接 v -ing。再次，可以表示“紧接在…之前”。before用于否定句还可表示“直到…为止”。注意before之后只能接表示时间点的名词，而不能接表示时间段的名词。
  • before可用于表示动态或静态的位置，意思是“在…之前”，与behind相对。
  • before可用于表示顺序或排列上的“在…之前”或“居于…之前”，与after相对。引申可用于表示比较，即在等级、价值、重要性、能力等方面的“在先”“优于”“重于”。再引申则可用于表示对某事物的优先选择，即“宁可”或“与其…宁可”。
  • before还可表示“面对，在…眼前，在…面前”“有待于去完成”“在审理中，由…考虑”“在…压力下”等。

    • conj. (连词)

  • before主要引导时间状语从句，意为“先于”“…之后才”“(不多久)就…”。当主句是将来时时，从句谓语动词须用现在时；当主句是一般过去时或过去完成时时，从句常用过去时。before引导的时间状语从句不能用于否定式。
  • before还可用于barely〔scarcely〕...before结构，意为“刚…就…”。
  • before还可引导让步状语从句，意思是“宁愿…也不…”。
  • before引导的从句常用省略句型。

    • adv. (副词)

  • before用作副词时,意思是“以前,在前面”,表示从较近的过去至较远的过去。用作时间状语泛指以前、不与具体时间连用时，谓语动词可以用一般过去时,也可用现在完成时,前者只表示“过去发生过”,后者则强调“对现在有影响”。
  • before与具体时间连用时,一般置于其后，谓语动词通常用过去完成时。

英汉例句

    用作介词 (prep.)

  • The man standing before the blackboard is our English teacher.
    站在黑板前面的那个人是我们的英语老师。

    • 用作连词 (conj.)

  • Be a pupil before you become a teacher.
    先做学生,再做老师。

    • 用作副词 (adv.)

  • We saw that film before.
    那部电影我们以前看过。

词组短语

    用作介词 (prep.)

    动词+～

  • appear before 在(某时)之前出现;出庭
  • carry before 迅速获胜,势如破竹
  • come before 在…之上,比…重要;被交由…处理；被提交…考虑
  • complain before 控诉
  • go before 居先；走在前面

英英字典

    剑桥英英字典

  • at or during a time earlier than (the thing mentioned)
  • in front of

    • 柯林斯英英字典

  • If something happens before a particular date, time, or event, it happens earlier than that date, time, or event.
  • Before is also a conjunction.
  • If you do one thing before doing something else, you do it earlier than the other thing.
  • Before is also a conjunction.
  • You use before when you are talking about time. For example, if something happened the day before a particular date or event, it happened during the previous day.
  • Before is also a preposition.
  • Before is also a conjunction.
  • If you do something before someone else can do something, you do it when they have not yet done it.
  • If someone has done something before, they have done it on a previous occasion. If someone has not done something before, they have never done it.
  • If there is a period of time or if several things are done before something happens, it takes that amount of time or effort for this thing to happen.
  • If a particular situation has to happen before something else happens, this situation must happen or exist in order for the other thing to happen.
  • If someone is before something, they are in front of it.
  • If you tell someone that one place is a certain distance before another, you mean that they will come to the first place first.
  • If you appear or come before an official person or group, you go there and answer questions.
  • If something happens before a particular person or group, it is seen by or happens while this person or this group is present.
  • If you have something such as a trip, a task, or a stage of your life before you, you must do it or live through it in the future.
  • When you want to say that one person or thing is more important than another, you can say that they come before the other person or thing.
  • before long&rarrsee long