previous与before的区别是？从意思上去区别它们
两个词差别很大的，Previous 多用作形容词，而before 是介词、连词、副词
仔细看看下面词典上各词的解释
previous /ˈpriːvɪəs/ CET4 TEM4
1.ADJ A previous event or thing is one that happened or existed before the one that you are talking about. 前一次的
例：
She has a teenage daughter from a previous marriage.
她有个出自前一次婚姻的十几岁的女儿。
2.ADJ You refer to the period of time or the thing immediately before the one that you are talking about as the previous one. 前一个的
例：
It was a surprisingly dry day after the rain of the previous week.
这是继前一周的降雨之后出奇干燥的一天。
before /bɪˈfɔː/ CET4 TEM4
1.PREP If something happens before a particular date, time, or event, it happens earlier than that date, time, or event. 在 (某日、某时、某事件) 以前
例：
Annie was born a few weeks before Christmas.
安妮在圣诞节前几个礼拜出生。
Before World War II, women were not recruited as intelligence officers.
二战前，女性不被征募为情报官。
2.CONJ Before is also a conjunction. 在 (某日、某时、某事件) 以前
例：
Stock prices have climbed close to the peak they'd registered before the stock market crashed in 1987.
股票价格已经快爬升到了1987年股市崩溃前的最高纪录。
3.PREP If you do one thing before doing something else, you do it earlier than the other thing. 在 (做某事) 之前
例：
He spent his early life in Sri Lanka before moving to Canada.
移居加拿大前，他早年生活在斯里兰卡。
4.CONJ Before is also a conjunction. 在 (做某事) 之前
例：
He took a cold shower and then towelled off before he put on fresh clothes.
他穿上干净衣服之前，冲了个冷水澡，再擦干身子。
5.ADV 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. (某时、某事) 以前
例：
The war had ended only a month or so before.
战争大约在一个月前才结束。
6.PREP Before is also a preposition. (某时、某事) 以前
例：
It's interesting that he sent me the book twenty days before the deadline for my book.
有趣的是，在距离我书的截止日期20天前他把那本书寄给了我。
7.CONJ Before is also a conjunction. (某时、某事) 以前
例：
Kelman had a book published in the U.S. more than a decade before a British publisher would touch him.
科尔曼在美国已经出版了一本书，十多年后英国的出版商才愿意出版他的作品。
8.CONJ If you do something before someone else can do something, you do it when they have not yet done it. 在 (某人能做某事) 之前
例：
Before Gallacher could catch up with the ball, Nadlovu had beaten him to it.
在加拉赫能接住球之前，纳德洛夫就已经比他先接到了。
9.ADV 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. 以前 (做过某事)
例：
I've been here before.
我以前来过这儿。
I had met Professor Lown before.
我以前见过劳恩教授。
10.CONJ 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. 经过 (一段时间或努力) 才
例：
It was some time before the door opened in response to his ring.
他按过门铃后好一会儿门才打开。
11.CONJ 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. 在 (某事发生) 之前 (另一情况必须发生)
例：
There was additional work to be done before all the troops would be ready.
在全军准备就绪之前还有些事情要做。
12.PREP If someone is before something, they are in front of it. 在 (某物) 前面
例：
They drove through a tall iron gate and stopped before a large white villa.
他们开车穿过一扇高高的铁门，然后停在了一幢白色大别墅前。
13.PREP If you tell someone that one place is a certain distance before another, you mean that they will come to the first place first. 在 (某地) 前方 (某距离处)
例：
The station is on the right, one mile before downtown Romney.
车站在右侧，罗姆尼市中心前方一英里处。
14.PREP If you appear or come before an official person or group, you go there and answer questions. 在 (人或组织) 面前 (回答提问)
例：
The governor will appear before the committee next Tuesday.
这名行政官员将于下周二面对该委员会回答提问。
15.PREP If something happens before a particular person or group, it is seen by or happens while this person or this group is present. (发生) 在 (某人、某组织) 面前
例：
The game followed a colourful opening ceremony before a crowd of seventy-four thousand.
紧随一场精彩的开幕式，该比赛在7.4万名观众面前拉开了帷幕。
16.PREP 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. (必须经历的事情) 在 (某人) 面前
例：
Everyone in the room knew it was the single hardest task before them.
屋子里每个人都知道这是摆在他们面前的一项最艰巨的任务。
17.PREP 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. (重要性) 以…为先
例：
Her husband and her children came before her needs.
她的丈夫和孩子们比她的需要更重要。
before
[bɪ'fɔː]
prep. 在…之前，先于
conj. 在…以前；在…之前
adv. 以前；在前
Previous是什么意思？
previous的意思是：1、adj. 以前的；早先的；过早的2、adv. 在先；在…以前【读音】英 [ˈpriːviəs] 美 [ˈpriːviəs] 【短语】1、Previous Packet 前一个数据包2、patch Previous 补丁3、Previous window 前一个窗口 ; 前窗 ; 上一个窗口4、Previous Column 游标移至上一列 ; 前一列5、previous job 以前的工作6、Previous education 最后学历 ; 前导教育扩展资料previous的近义词ago【读音】英 [əˈɡəʊ] 美 [əˈɡoʊ] 【意思】1、adv. 以前2、adj. 以前的3、n. (Ago) （美）阿戈（人名）【短语】1、archipei ago 群岛2、Isamu Ago 主3、before ago 与过去时连用4、ago long 不久以后5、ago o 示意一段时间 ; 以前 ; 以 ; 表示一段时间6、pull ago 撤退
Previous汉语意思
previous英 [ˈpriːviəs] 美 [ˈpriːviəs] adj. 以前的；早先的；过早的adv. 在先；在?以前短语：previous year 前一年previous generation 前代；当代previous period 前期previous page 上一页，前一页；返回上一级菜单previous frame 上一帧；前一帧previous arrangement 前次安排例句：She has a teenage daughter from a previous marriage.她有个出自前一次婚姻的十几岁的女儿扩展资料：previous的同义词：preceding英 [prɪ'siːdɪŋ] 美 ['prisidɪŋ] adj. 在前的；前述的v. 在...之前（precede的ing形式）短语preceding quarter 上季度preceding text 前面的文意 ; 上文preceding depression 先行萧条Preceding days 前面几天Preceding said 前面刚说过的例句：As we saw in the preceding chapter, groups can be powerful agents of socialization.如我们在前一章所见，团组可以是社会化的有力动因。former英 [ˈfɔːmə(r)] 美 [ˈfɔːrmər] adj. 从前的，前者的；前任的n. 模型，样板；起形成作用的人n. (Former)人名；(法)福尔梅；(德、捷)福尔默短语：former president 前任总统former residence 故居former name 曾用名in former times 从前例句：I am not a hired agent for the former president. 我可不是那位前总统的说客。
音响的PREV/CH-什么意思
PREV（CH-）：上一曲/上一频道。就是在播放音乐时，可以点击此按钮播放上一首歌。而在听收音机时，此按钮代表切换上一频道。扩展资料：MODE：模式，选择插卡播放或收音机的按钮。EQ：均衡器，选择均衡器工作与否。REPEAT：重复，选择单曲播放或顺序播放。STOP：停止。PREV（CH-）：上一曲，在收音模式下为上一频道。PLAY/PAUSE（SCAN）：播放/暂停，在收音模式下为自动扫描。NEXT（CH+）：下一曲，在收音模式下为下一频道。参考资料：百度百科-音响
prev是什么意思啊
意思：abbr. 上一个；先前的读音：英 [prɪv]、美 [prɪv] 原型：previous（缩写）读音：英 ['priːviəs]、美 ['priːviəs] 副词：previously 名词：previousness例句：1、Prev 2000-point mark again stress tests.沪指2000点关口再次接受压力测试。2、Once again, from the surface, yesterday Prev Maung weak trend is strong.再次，从盘面看，昨日沪指走势貌弱实强。扩展资料近义词：1、earlier读音：英 ['ɜːlɪə]、美 ['ɜːrlɪər] 意思：adj. 早的；初期的adv. 更早地例句：We should get acquainted with our parents earlier.我们应该更早的了解自己的父母。2、former读音：英 ['fɔːmə(r)]、美 ['fɔːrmər] 意思：adj. 前者的；前任的；以前的n. 创造者；学校某一年级的学生例句：Of these two men, the former is dead but the latter is still alive.这两个人中，前者已死，而后者仍然活着。
