begin [bɪˈɡɪn]动词，开始

例如Our new term usually begins in September.

A journey of a thousand miles begins with a single step. 千里之行，始于足下。

【句式】begin to do/doing

例如Bill began learning /to play the drums at the age of five.

【词组】to begin with

【拓展】过去式began 过去分词begun 延续性动词has been on

【巩固练习】

The meeting ________ by the time I got there yesterday.

A. was on B. has been on

C. had begun D. has begun

解析：选B