spesk、 tell、 talk about的区别

speak：可作不及物动词，表示说话；也可作及物动词，表示一种能力。
tell: 告诉，常与介词about, to连用。
常用句型：tell sb about sth; tell sb to do sth
talk：侧重说话，多与to, with, about连用。

e.g. Can you speak English? 你会说英语吗？
Please tell me about his situation. 请告诉我关于他的情况。
Tell him not to smoke. 告诉他不要吸烟。
I'd like to talk to/with her. 我喜欢和他交谈。
Don't talk about the bad weather. 不要谈论这个坏天气。

Speak, Talk, Say和Tell

Speak比较庄重，表示某人(即讲者)在一段对话中所说的话较其它人多。

举例：

The Principal speaks to us every morning at the assembly.

Tom, your boss wants to speak to you.

Talk不及speak庄重，而且多用于说话，少用于书写。 Talk表示两个或更多的人在对话。

举例：

The students were talking loudly in the classroom, in the very presence of the teacher.

当宾语是一种语言时，要用 speak 不用 talk 或 say：

正确： Victor speaks fluent Putonghua.

错误： Victor talks fluent Putonghua.

错误： Victor says fluent Putonghua.

在书面英语，