before
音標(biāo)發(fā)音
- 英式音標(biāo) [b??f?:(r)]
- 美式音標(biāo) [b??f?r,-?for]
- 國(guó)際音標(biāo) [bi'f?:]
- 英式發(fā)音
- 美式發(fā)音
基本解釋
- prep. 在……之前，先于；在……面前；面對(duì)（法院、法庭或其他官方機(jī)關(guān)）并受審；（寧愿……）不愿
- conj. 在……以前；到……為止；以免，不然；（寧可……而）不愿
- adv. 以前，過(guò)去，已經(jīng)
用法辨析
- before可用于表示時(shí)間。首先，可以表示“先于，在…以前”，其后可以跟表示具體日期、時(shí)間等的名詞或數(shù)詞，也可以跟表示時(shí)間或動(dòng)作的名詞。其次，可以表示“在做…之前”，后接 v -ing。再次，可以表示“緊接在…之前”。before用于否定句還可表示“直到…為止”。注意before之后只能接表示時(shí)間點(diǎn)的名詞，而不能接表示時(shí)間段的名詞。
- before可用于表示動(dòng)態(tài)或靜態(tài)的位置，意思是“在…之前”，與behind相對(duì)。
- before可用于表示順序或排列上的“在…之前”或“居于…之前”，與after相對(duì)。引申可用于表示比較，即在等級(jí)、價(jià)值、重要性、能力等方面的“在先”“優(yōu)于”“重于”。再引申則可用于表示對(duì)某事物的優(yōu)先選擇，即“寧可”或“與其…寧可”。
- before還可表示“面對(duì)，在…眼前，在…面前”“有待于去完成”“在審理中，由…考慮”“在…壓力下”等。
- before主要引導(dǎo)時(shí)間狀語(yǔ)從句，意為“先于”“…之后才”“(不多久)就…”。當(dāng)主句是將來(lái)時(shí)時(shí)，從句謂語(yǔ)動(dòng)詞須用現(xiàn)在時(shí)；當(dāng)主句是一般過(guò)去時(shí)或過(guò)去完成時(shí)時(shí)，從句常用過(guò)去時(shí)。before引導(dǎo)的時(shí)間狀語(yǔ)從句不能用于否定式。
- before還可用于barely〔scarcely〕...before結(jié)構(gòu)，意為“剛…就…”。
- before還可引導(dǎo)讓步狀語(yǔ)從句，意思是“寧愿…也不…”。
- before引導(dǎo)的從句常用省略句型。
- before用作副詞時(shí),意思是“以前,在前面”,表示從較近的過(guò)去至較遠(yuǎn)的過(guò)去。用作時(shí)間狀語(yǔ)泛指以前、不與具體時(shí)間連用時(shí)，謂語(yǔ)動(dòng)詞可以用一般過(guò)去時(shí),也可用現(xiàn)在完成時(shí),前者只表示“過(guò)去發(fā)生過(guò)”,后者則強(qiáng)調(diào)“對(duì)現(xiàn)在有影響”。
- before與具體時(shí)間連用時(shí),一般置于其后，謂語(yǔ)動(dòng)詞通常用過(guò)去完成時(shí)。
prep. (介詞)
conj. (連詞)
adv. (副詞)
英漢例句
- The man standing before the blackboard is our English teacher.
站在黑板前面的那個(gè)人是我們的英語(yǔ)老師。 - Be a pupil before you become a teacher.
先做學(xué)生,再做老師。 - We saw that film before.
那部電影我們以前看過(guò)。
用作介詞 (prep.)
用作連詞 (conj.)
用作副詞 (adv.)
詞組短語(yǔ)
- appear before 在(某時(shí))之前出現(xiàn);出庭
- carry before 迅速獲勝,勢(shì)如破竹
- come before 在…之上,比…重要;被交由…處理；被提交…考慮
- complain before 控訴
- go before 居先；走在前面
用作介詞 (prep.)
動(dòng)詞+～
英英字典
- at or during a time earlier than (the thing mentioned)
- in front of
- 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