English简单

1. Speak 为及物动词, 当和..人说话时, 与宾语之间要用一个介词 “to”连接, 其句子结构为Somebody speaks to someone. (Ex. I want to speak to you, please.) Speak 也用来形容某人会说哪些语言, 此时Speak和语言之间无需任何介词, 其句子结构为 Somebody speaks + language well. (Ex. Mr. Wang Qiang speaks English very well.)
2. Say 为及物动词, 但其宾语通常为事情, 其句子结构为 Somebody says something to someone. (Ex. Jack wants to say something about his family to me.)
3. Talk 为及物动词, 意思为和某人交谈, 其句子结构为 Somebody talks with/to somebody about something/somebody. (Ex. Charlie talks to Emma about getting a new car.)

say后面是要有内容的~~比如某某说"XX去死",这里就要用SAY
speak更多时候类似于汉语里的 讲 ,比如将英文speak in English.

call相当于 叫 比如把某人叫做XX call sb. sth.