doing与名词间有逗号，是不是都不是作后定,而是状语

doing与名词间有逗号，是不是都不是作后定,而是状语？

如何区分句末的doing是做伴随还是结果？

为什么主句的主宾要颠倒？

doing与名词间有逗号，是不是都不是作后定,而是状语？

我的理解是：如果是定语，则没有逗号

第二个问题没有太看明白，可以给个例子吗？

其实不是主宾颠倒，我觉得考点是entering law school的修饰问题。
women are expected to be the majority of student
                            entering law school this fall  修饰有歧义

比如

20. GWD26-Q20

In 1981 children in the United States spent an average
        of slightly less than two and a half hours a week doing
        household chore s; by 1997 they had spent nearly six hours a week.

A.      chores; by 1997 they had spent nearly six hours
        a week

B.      chores; by 1997 that figure had grown to nearly
        six hours a week

C.      chores, whereas nearly six hours a week were
        spent in 1997

D.      chores, compared with a figure of nearly six hours a week in 1997

E.       chores, that figure growing to nearly six hours a week in 1997

为什么主句的主宾要颠倒？

1,中a trend对应了women,不当;并且placing表示伴随,修饰a trend,其后并没有其他动词,如果就算要用placing,也应该是be placing.

2,中
                        the majority of student entering law school this fall为一整体事件,与a trend对应,that后面跟clause而非phrase,这里用了that will ultimately是正确的

呵呵~我语法不太好,LZ请将就着.