1 . begin to do sth 开始做某事。如: Soon it began to rain. 不久天就开始下雨了。 He sat down at the desk and began to write. 他在桌子前坐下就开始写了起来。 2 . began doing sth 开始做某事。如: He began doing this job last year. 他去年开始做这工作。 H...