下面两个句子是错误的吗?怎么改?
问题描述：
下面两个句子是错误的吗?怎么改?
1:The commons rule that we follow which are called grammar.
2:The common rule that we follow is called grammar.
答
改正1：The common rules that we follow which are called grammars.
2:The common rule that we follow which is called grammar.