1. The moon, which is far away from the earth, creates many beautiful stories.
这句话中在creates前面用了逗号。
2. As is known to everybody, Einstein is a famous scientist.
As is known to everybody是非限定性定语从句,它放在前面,然后这句的末尾与主句之间用了一个逗号隔开。
3. Einstein, as we all know, is a famous scientist.
这句话也是在as从句后与后面的主句之间隔了一个逗号。
请教一下老师,如果从句放在句首或句中,从句末尾要与后面的主句之间用逗号隔开是吗?
然后as we all know的as是什么意思?