及物动词

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1. 开始；着手
To begin to do something means to start doing it.

2. （使）开始（进行或存在）
When something begins or when you begin it, it takes place from a particular time onwards.

3. 从…开始；从…着手；首先做（某事）
If you begin with something, or begin by doing something, this is the first thing you do.

4. 开始说；开口说
You use begin to mention the first thing that someone says.

5. 起初是；开始是
If one thing began as another, it first existed in the form of the second thing.

6. （界限或边缘）起始于
If you say that a thing or place begins somewhere, you are talking about one of its limits or edges.

7. 以…开头；首字母为
If a word begins with a particular letter, that is the first letter of that word.

8. 无法，难以（解释、理解、想象等）
If you say that you cannot begin to imagine, understand, or explain something, you are emphasizing that it is almost impossible to explain, understand, or imagine.

9. 最初；刚开始
You use to begin with when you are talking about the first stage of a situation, event, or process.

10. 首先；第一
You use to begin with to introduce the first of several things that you want to say.

11. charity begins at home - see charity
begin life - see life

Begin, start, and commence all have a similar meaning, although commence is more formal and is not normally used in conversation. The meeting is ready to begin... He tore the list up and started a fresh one. ...an alternative to commencing the process of European integration. Note that begin, start, and commence can all be followed by an -ing form or a noun, but only begin and start can be followed by a 'to' infinitive.
begin, start 和 commence 意思相近，但 commence 更为正式，通常不用在日常对话中：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，开始另列一张），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 后都可以接 -ing 形式或名词，但只有 begin 和 start 可以接带 to 的动词不定式。