1.speak:意义:①说 vt. (及物动词) eg.Can you speak English? (speak+表示语言的名词)
②演讲;发言 vi.(不及物动词) eg. Who will speak at the meeting? 谁将会在会上发言?
2.say:意义:说 vt. eg.Please say it in English. 请用英语说它. (强调说话的内容)
3.tell:意义:告诉 vt. eg.Please tell me the truth! 请告诉我真相!
4.talk:意义:说话;交谈 vi. eg. Don't talk! 别说话! (常用句型:①talk to..=talk with.. ②talk about..)