begin有没有to do结构，to do 结构和doing结构有什么区别

begin有没有to do结构，to do 结构和doing结构有什么区别

一般来说，begin to do和begin doing可以互换，但在以下三种情况下，用to do：

1. 主语不是指人，而是it等。如：It began to rain.

2. begin后接表示心理活动的词。如：begin to know
believe， wonder， think等。

3. begin本身是ing形式，为避免重复后接to do
即，beginning to do

begin to do 是开始做另外一件事

begin doing 是开始接着做同一件事

*Start有相同用法

begin / bI5gIn; bI`^In/ v (-nn-; pt began/ bI5gn; bI`^An/, pp begun/ bI5gQn; bI`^Qn/) 1 (a) [Tn] set (sth) in motion; start 使（某物）启动; 开始: begin work, a meeting 开始工作、开会 * The building hasn't even been begun. 这座建筑物还没有动工呢. * I began school (ie attended it for the first time) when I was five. 我五岁入学. * He has begun (ie started reading or writing) a new book. 他已开始读（或写）一本新书. (b) [I] be set in motion; start 启动; 开始: When does the concert begin? 音乐会什麽时候开始? * The meeting will begin at nine. 会议将在九点开始. * Building began last year. 建筑工程去年已经开始. 2 (a) [Tt] (used to indicate states of mind, or mental activities, which are starting 用以指心理状态和思维活动的开始): She began to feel dizzy. 她感到头昏眼花. * I'm beginning to understand. 我逐渐明白了. * I was beginning to think you'd never come. 我开始意识到你永远不会来了. (b) [Tt, Tg] (used to indicate a process that is beginning, the subject being a thing, not a person 用以指一过程的开始, 主语是物而不是人): The paper was beginning to peel off the walls. 墙上的纸渐渐脱落了. * The barometer began to fall. 气压计的读数开始下降. * The water is beginning to boil. 水逐渐沸腾起来. => Usage 见所附用法. 3 [I, Ipr] be the first to do sth or take the first step in doing sth （在做某事时）作为起始者或作为第一步: Shall I begin (ie take the first step or be the first to speak)? 我可以开始说了吗[可以由我开始吗]? * Let's begin at (ie start from) page 9. 我们从第9页开始吧. * She's begun on (ie started writing or reading) a new novel. 她已开始写（或阅读）一本新小说. * I have to begin with an apology. 我得首先表示歉意. 4 [I, Ipr] have its starting-point or first element; have its nearest boundary 起始於; 起源於; 最接近的界限为: When does spring end and summer begin? 春天在什麽时候结束, 夏天从什麽时候开始? * The new fare will be 1, beginning (from) next month. 从下月起, 新车费为1英镑. * The English alphabet begins with `A' and ends with `Z'. 英文字母表以A开始, 以Z结束. 5 [Tt] (infml 口) (usu in negative sentences 用於否定句)