Question

一个关于英语语法的问题！有点白痴，但是我有点困惑！

我是这么认为的，I am happy about that my sister gets marry at 40 years old!
我认为是about后面是介词之后加宾语，所以我写成宾语从句，然后因为用that所以不缺成分.
但是我的外国老师说that和get marry是重复的！
所以叫我改成I am happy about my sister getting married at 40.....
about 后面不能引从句？为什么？说的不明不白的！我要具体而且有依据的答案！

Answer 1

I'm hppy about sb doing sth = I'm hppy that sb did/does sth
about 这里是介词
比如In her novel she wrote articles about her trip in XXX
此时可以用...she wrote articles about her traveling XXX

但是about后面是不接从句的
about sb doing sth是一个动名词结构 表达动词含义 却是名词形式

再如 http://zhidao.baidu.com/question/111158506.html
这是一个很不负责任的回答
我用朗文第五版的例句来说明
I think that you're being unfair.
如果是think about的例句 就很干脆地接上名词结构
She lay awake thinking about the money.
这句很简洁
A previous divorce can make you think twice about getting married again.
这句用了动名词结构
Universities may be forced to think again about the courses they provided.
这句用了名词然后接了定语从句修饰名词

再说一句ABOUT后面通常不直接接从句

希望boomsmile再考虑一下

Answer 2

去掉about也是可以的
about后面不能引导从句

Answer 3

都是可行的，宾语从句的引导词可以省略的。

Answer 4

语法规定，about不可以接从句，只可以用which,that,who,whose,where等，没有理由。你这个问题就好像问人为什么要吃饭一样