commence
- v.开始;着手;开始发生
过去式： commenced 现在分词： commencing 过去分词： commenced 第三人称单数： commences
commenceverb
formal开始发生；开始；着手
to begin to happen; to begin sth
The meeting is scheduled to commence at noon.
会议定于午间召开。
The day commenced with a welcome from the principal.
那天由校长致欢迎词开始。
I will be on leave during the week commencing 15 February.
我将从2月15日开始一周的休假。
She commenced her medical career in 1956.
她于1956年开始行医。
We commence building next week.
我们下周破土动工。
These words are all used to talk about things happening from the beginning, or people doing the first part of sth.以上各词均用以指事情开始发生或开始做某事。
to begin to happen or exist; to begin in a particular way or from a particular point 指开始发生或存在、以…开始、以…为起点：
When does the class start?
什么时候上课？
to start to happen or exist; to start in a particular way or from a particular point; to start speaking 指开始发生或存在、以…开始、以…为起点、开始讲话：
When does the concert begin?
音乐会什么时候开始？
There is not much difference in meaning between these words. Start is more frequent in spoken English and in business contexts; begin is more frequent in written English and is often used when you are describing a series of events. |
Start is not used to mean ‘begin speaking’. |
( rather informal ) to start happening or doing sth; to start by doing or being sth 指进行或开展起来、首先进行、一开始是：
The discussion started off mildly enough.
讨论颇为温和地开展起来。
( informal ) to start an event or activity, especially in a particular way; (of an event, activity, etc.) to start, especially in a particular way 尤指以…开始（活动）、（活动）以…开始：
Tom will kick off with a few comments.
汤姆讲话时要先发表几点意见。
The festival kicks off on Monday, September 13.
节期从9月13日星期一开始。
( formal ) to start happening 指开始发生：
The meeting is scheduled to commence at noon.
会议定于午间召开。
to start an event or activity in a particular way; (of an event, film/movie or book) to start, especially in a particular way 指以…开始（活动）、（活动、电影或书）以…开头／开篇：
The story opens with a murder.
故事以一宗谋杀案作序幕。
to start 指开始：
Preparations have got under way for a week of special events in May.
五月份特别活动周的准备工作已经开始。
commence
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V-ERG 开始
When something commences or you commence it, it begins.The academic year commences at the beginning of October...
学年于10月初开始。
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commence, start 和 begin 三个词意思相近，不过 commence 一词更为正式，通常不用于对话中。例如，The meeting is ready to begin (会议可以开始了)，He tore the list up and started a fresh one (他把清单撕碎，然后另列一张)，an alternative to commencing the process of European integration (启动欧洲一体化进程的另一种方式)。注意 begin, start 和 commence 都能后接动词的 -ing 形式或名词，但只有 begin 和 start 才能后接不定式。
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verb
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- take the first step or steps in carrying out an action
- We began working at dawn
- Who will start?
- Get working as soon as the sun rises!
- The first tourists began to arrive in Cambodia
- He began early in the day
- Let's get down to work now
- Synonym: get down begin get start out start set about set out
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2
- set in motion, cause to start
- The U.S. started a war in the Middle East
- The Iraqis began hostilities
- begin a new chapter in your life
- Synonym: begin lead off start
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3
- get off the ground
- Who started this company?
- We embarked on an exciting enterprise
- I start my day with a good breakfast
- We began the new semester
- The afternoon session begins at 4 PM
- The blood shed started when the partisans launched a surprise attack
- Synonym: start start up embark on
数据来源：WordNet
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Training will commence on 5 October , running from Tuesday to Saturday inclusive .
培训将于10月5日开始，从星期二（含）到星期六（含）。
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If everyone has arrived , we may now commence the meeting .
如果人都到齐了，现在我们可以开始开会。
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The day commenced with a welcome from the principal .
那天由校长致欢迎词开始。
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We commence building next week .
我们下周破土动工。
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I will be on leave during the week commencing 15 February .
我将从2月15日开始一周的休假。
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She commenced her medical career in 1956 .
她于1956年开始行医。
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The meeting is scheduled to commence at noon .
会议定于午间召开。
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Joan was very much against commencing drug treatment .
琼极力反对进行药物治疗。
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The academic year commences at the beginning of October
学年于10月初开始。
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They commenced a systematic search
他们开始进行彻底搜查。
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The dentist commenced to dig , drill and finally fill the offending tooth .
牙医开始在那颗有问题的牙齿上挖洞，钻孔，直到最后把它补好。
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The hunter knelt beside the animal carcass and commenced to skin it .
猎人跪在动物尸体旁边，开始剥皮。
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They 'll commence building next week .
他们下周破土动工。
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Further negotiations on services will commence in 2012 .
服务业的进一步谈判将于2012年开启。
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The rain commenced pouring violently down .
瓢泼大雨猛烈地下了起来。
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We have commenced the sale of local products abroad .
本地土产开始销行国外。
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He commenced on a technical innovation two years ago but has made no progress so far .
两年前他着手进行一项技术革新，但迄今尚无任何进展。
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He has commenced on a new book .
他已开始读一本新书。
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The young girl took the cheese and commenced to eat .
那个年轻女孩拿了干酪开始吃起来。
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Many important businessmen commenced as factory workers .
许多显赫的企业家都是从工厂的工人做起的。
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He commenced on a piece of work .
他着手搞一项工作。
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The second term commenced in march .
第二学期自三月份开始。
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Tom and his companions commence on their third bottle in an hour .
汤姆和他的同伴在一个小时内开始喝第三瓶酒了。
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She commenced her life as an actress in the1930s .
从30年代她就开始了舞台生涯。
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You should commence with this book .
你该先读这本书。
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The word commences with a vowel .
这个词开头是元音。
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The newspaper had commenced as a duplicated broadsheet .
这家报纸最初为双面版。
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She commences to unburden herself of her belongings , which she has been carrying in the sleeves of her kimono .
她开始一件件拿出藏在和服两袖中带来的自家的东西。
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We will commence with this work .
我们将开始这项工作。
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China 's southernmost province of Hainan has commenced operations of the world 's first island-looping high-speed train line .
近日，全球首条环岛高铁线路在我国最南省份的海南全面贯通了。
指动作开始且持续下去，强调开始这一事实。
The yacht will start its maiden voyage next week.
这艘游艇将于下周开始它的处女航。
They were starting to skate.
他们正开始滑冰。
Wet the clay a bit more before you start to mould it.
把泥弄湿点再动手塑形。
最常用词，指为某一过程或进程开个头，常可与 start 换用。
They began/started to work.
他们开始工作了。
The class began/started with a story.
这节课是从一个故事开始的。
When did you begin/start learning Japanese?
你何时开始学习日语的？
指开始某种正式行动，常伴有正式程序或一定的仪式，语气庄重。
When will the opening ceremony commence?
开幕式什么时候开始?
They'll commence building next week.
他们下周破土动工。
Further negotiations on services will commence in 2012.
服务业的进一步谈判将于2012年开启。