begin/bɪˈɡɪn/
vt., vi.began, begun, beginning开始It began to rain.天开始下雨。
The film begins at two o'clock.电影两点钟开始。
Knowledge begin with practice.认识从实践开始。
After running half a kilometer, I began to feel tired.跑了500米之后，我开始感到累了。
These machines are beginning to date.这些机器快要过时了。