求tell，say，speak，talk这四词的区别

speak讲语言 speak to sb about sth
tell告诉 tell sb sth/tell sth to sb
say说 say sth to sb
talk交谈,聊天 talk to sb/talk sb about sth
say ,speak talk 和tell辨析。
▲ say一般作及物动词用，着重说话的内容，它的宾语可以是名词，代
词或宾语从句。
eg: He can say his name. 他会说他的名字。
Please say it in English. 请用英语用。
She`s saying ,Don`t draw on the wall.她在说“别在墙上画”。
▲ speak强调说的动作，不强调所说的内容 。作及物动词时，常以某种
语言作宾语。作不及物动词时，常见的搭配形式有：
speak of something/somebody谈到某事（某人）speak to sb 跟某
人讲话，此外speak还可用于在较为正式的场合了表演讲或演说。
Can you speak Japanese? 你会说日语吗？
She is speaking to her teacher. 她正在跟她的老师说话。
He spoke at the meeting yesterday. 他昨天在会上讲了话。
▲ talk 一般为不及物动词，意思是“交谈，谈话，着重强调两具之间的
相互说话。
eg: She is talking with Lucy in English.
她正在和露茜用英语交谈。
What are you talking about? 你们在谈论什么？
The teacher is talking to him. 老师正在和他谈话。
▲ tell常作及物动词，意为“讲述，告诉，动词常跟双宾语。
tell sb sth＝tell sth to sb告诉某人某事。
eg: He is telling the children a story.
他正在给孩子们讲一个故事。
Did you tell her the news?＝Did you tell the news to her?
你把这个消息告诉她了吗？

首先speak，
tell,
say是及物动词；talk是不及物动词。
speak
后一般加表示“语言”的词，例如:speak
english;
当然它也可以做不及物动词，例如：please
speak
slowy.
talk是不及物动词，它一般和with,
to等介词连用，例如.
it's
useless
to
talk
with
him.
tell意思是“告诉”，
一般用作tell
sb,
tell
sb
to
do
sth,
例如
i
will
tell
him
when
he
comes
back.my
mother
told
me
to
study
hard.
say
后面一般接名词或代词，比如
see
a
word,
再比如有首歌叫say
you
say
me.

tell是告诉，比如我告诉你xxxx，I tell you xxx
say是说，后面一般带一个从句,表达某件事情, 比如我说xxx, I say xxx
speak也是说,但后面不接事件,一般接名词, 通常侧重于"说话"这个动作，比如 I speak in English. We are no longer speaking.
talk是侧重于"谈论" I'm talking about xxx

speak是说的意思,如speak English
tell的意思是讲,如tell a story
say的意思是说,如say it again
talk的意思是谈论,如talk about