begin /biˈɡin/ vi.& vt.(began, begun)开始： The match will begin at nine o’clock.比赛将在九点钟开始。He thought it better to begin work immediately. 他觉得还是马上开始工作较好。Well begun is half done. ［谚］良好的开端是成功的一半。They were beginning to feel hungry.他们渐渐觉得饿了。The snow began to melt when the sun came out. 太阳出来时，雪就开始融化了。Computers have also begun serving agriculture. 计算机也已开始为农业服务了。begin with以…开始：Knowledge begins with practice. 认识从实践开始。
beginner /biˈɡinə/ n. ［c］初学者，无经验者：The young man is a raw beginner.那个年轻人是个生手。As a beginner,everything is very new to him.他刚起步，对一切都很生疏。
beginning /biˈɡiniŋ/ n. ［u］&［c］开始：from beginning to end 从头至尾A good beginning makes a good ending.［谚］欲善其终必先善其始。at the beginning of 起初，开始：The first tomb, which is known as Chang Ling, was built at the beginning of the 15th century. 第一座墓叫做长陵，是十五世纪初修建的。This adverb can also be placed at the beginning of the sentence. 这个副词也可放在句首。
