Once limited to a few hours a week, there are now at least four cable networks with children's programming that dedicate themselves entirely to shows produced specifically for children.
语法 Sentence Correction-3918
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正确的用户笔记
海蓝新雨 2015-07-25 15:49:58
动作发出者不对
cechymery 2014-08-01 11:32:57
这个句子错在用分词作状语，那么逻辑主语是该句子主语不适合用there be句型
cechymery 2014-08-01 11:33:37
会显得没有修饰对象
金子0913 2016-07-22 19:03:01
limited 在这里应该修饰children's programming，但是there are 引导的主句主语是cable networks, 导致 limited 无修饰对象
ritarong 2015-02-08 09:25:46
once limited to a few hours a week没有修饰对象，过去分词表被动位于句首，逻辑宾语即为句子主语，因此，一般不适用there be句型
hbhqr 2015-02-05 20:49:17
once后面的内容没有主语。
