which后面加逗号是不是就意味着修饰前面的整个句子或主语,不加逗号就是修饰前面跟着的名词?就是好像很多句子当中的有的which前加了逗号,但是好像也没有修饰前面句子中的主语或整个句子?这些句子是在SAT的OG上出现的,P534 As children mature,they develop an independence that their parents,who have been responsible for them since they were born,often find difficult to accept.(这个句子里面的who前也加了逗号,但为什么是修饰parents 而不是children P534 Ms.Kovak proundly dsplayed her research group's most ingenious invention,a vacuum cleaner that emptied its own dusy bag when people pres
问题描述：
which后面加逗号是不是就意味着修饰前面的整个句子或主语,不加逗号就是修饰前面跟着的名词?
就是好像很多句子当中的有的which前加了逗号,但是好像也没有修饰前面句子中的主语或整个句子?
这些句子是在SAT的OG上出现的,
P534 As children mature,they develop an independence that their parents,who have been responsible for them since they were born,often find difficult to accept.(这个句子里面的who前也加了逗号,但为什么是修饰parents 而不是children
P534 Ms.Kovak proundly dsplayed her research group's most ingenious invention,a vacuum cleaner that emptied its own dusy bag when people press a botton.(这个when 跟在bag 为什么有会修饰句子主语呢?
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