the beautiful mother
John’s beautiful mother
Yesterday I met my girlfriend who live across the street.（花心大萝卜，女朋友不唯一）
Yesterday I met my girlfriend,who live across the street.（定语从句前面的名词已经是唯一）
David Beckham who modeled for a clothing company has earned quite a lot of money.(没打逗号，不唯一）
David Beckham,who modeled for a clothing company has earned quite a lot of money.
The man who live in this house has not been seen for days.(不唯一）
The mayor,who live in this house,has not been seen for days.(市长是唯一的，要打逗号）
Collin told me about his new job that he’s enjoying very much.(错误）
Collin told me about his new job,which he’s enjoying very much.（新工作，单数，唯一）
I have two office.The office I’m using at the moment is very small.(正确）
Ben’s father that used to be a teacher now works for a TV company.(错误）
Ben’s father,who used to be a teacher now works for a TV company.
She is extraordinarily beautiful,which makes her roommate envy her.
We ran out of money,which didn’t bother me a lot.
1、As sb say(says)…
2、As is said…
3、As we all know…
4、As is known to all…
5、As I have told you…
As we all know,the whale is not a fish but a mammal.|像我们所知道的那样，金鱼不是鱼，但是是哺乳动物）
=The whale is not a fish but a mammal,as we all know.
=The whale is not a fish but a mammal,which we all know.
As is known to us all,the whale is not a fish but a mammal.
=The whale is not a fish but a mammal,as is known to all.
=The whale is not a fish but a mammal,which is known to all.