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
