英语 语法是否错误?She has signed up for english language training courses,the cost of which is much more than her annual income这不是两个句子吗?为什么逗号直接连接两个句子

英语 语法是否错误?She has signed up for english language training courses,the cost of which is much more than her annual income这不是两个句子吗?为什么逗号直接连接两个句子
英语 语法是否错误?
She has signed up for english language training courses,the cost of which is much more than her annual income
这不是两个句子吗?为什么逗号直接连接两个句子

英语 语法是否错误?She has signed up for english language training courses,the cost of which is much more than her annual income这不是两个句子吗?为什么逗号直接连接两个句子
这是个主从复合句. 由于两句之间无并列连词, 所以第二句用了个关系代词【which】, 也就是说the cost of which is much more than her annual income是个非限制性的定语从句

She has signed up for english language training courses,the cost of[【which 】is much more than her annual income 从复合句
比较：
She has signed up for english language training courses,【but】 he cost of 【them】 uch more than her annual income. 并列句

【希望帮助到你,若有疑问,可以追问~~~
祝你学习进步,更上一层楼!(*^__^*)】

这不是用逗号连接的各自独立的两句话
它是一句话。
具体说来，这是定语从句。She has signed up for english language training courses是主句部分，而the cost of which is much more than her annual income部分则是定语从句，修饰主句中english language training ...

全部展开

这不是用逗号连接的各自独立的两句话
它是一句话。
具体说来，这是定语从句。She has signed up for english language training courses是主句部分，而the cost of which is much more than her annual income部分则是定语从句，修饰主句中english language training courses，对其做解释说明。
本句话的意思是：
她已经申请上了一门英语训练的课程，该课程申请费要比她的年收入多得多。

收起

逗号不能用来连接两个独立的句子，但是你给的是个复合句。
前面是主句，后面是非限制性定语从句，这样是可以的。如：
Typically, menus and dialog boxes offer the most, which is why we refer to them as pedagogic vectors.
通常来说，菜单和对话框提供最多的支持和帮助，因此我们...

全部展开

逗号不能用来连接两个独立的句子，但是你给的是个复合句。
前面是主句，后面是非限制性定语从句，这样是可以的。如：
Typically, menus and dialog boxes offer the most, which is why we refer to them as pedagogic vectors.
通常来说，菜单和对话框提供最多的支持和帮助，因此我们把这两种方式叫做“学习途径”。

收起

她报名参加了英语培训课程,其成本是远远超过她的年度收入

这是个主从复合句，which是个关系代词，引导非限定性定语从句。可分为两句话理解
She has signed up for english language training courses and the cost of the English language training courses is much more than her annual income.

全部展开

这是个主从复合句，which是个关系代词，引导非限定性定语从句。可分为两句话理解
She has signed up for english language training courses and the cost of the English language training courses is much more than her annual income.
上句中 which 指代的是 english language training courses ，是定语从句， 要是把which 换成
the English language training courses 就不能用逗号连接了，那就需要加一个连词 and.
又如，He has two sons , both of whom are doctors.

收起