mean的用法
1. mean doing sth.
mean doing sth. “意味着(必须要做某事或导致某种结果)”，其主语通常是指事物的词
Being a student means studying hard.
Success means working hard.
【误】Success means to work hard.
2. mean to do sth.
mean to do sth. “打算或企图做某事”, 其主语通常是表示人的名词或代词
had meant to do 过去完成式表示“本来打算做某事”
What do you mean to do with it?
We mean to call on you tomorrow.
He had meant to leave on Sunday, but has stayed on.【误】We mean calling on you tomorrow.
don't mean to do sth. 是其否定式，通常表示“无意做某事”
John really upset Granny，but I'm sure he did not mean to.
3. mean sb. to do sth.
mean sb. to do sth.的意思是“打算让某人做某事”。例如：
I mean you to work as our spokesman.
Do you really mean him to believe that your plan was right?
4. mean后接名词、副词或从句
mean后接名词或副词，意为“表示；打算；存心”等意思；后接that 从句，意为“表示……”。例如：
“I meant well,”he said. 他说，“我是好意。”
The sign means that the road is blocked.
5. mean用来解释某个词语的含义
mean 可用来解释某个词语的含义，表示“意思是……”，其后面的单词形式常与被解释的单词形式保持一致。如解释一个动词时，后接动词不定式；解释一个动名词，后接动名词形式。例如：
“Quake” means “to shake”. “Quake”的意思是“震动”。
6. What do / did you mean by...? 该句型的意思是“你……是什么意思?” 例如：
What do you mean by acting like this? 你这样做是什么意思?
7. be meant for “打算给予；打算作……用”
What is this meant for? 这准备作什么用?
These rooms are meant for the children's centre.
这些房间是打算用作少年活动中心的。
