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Afterawhilethegovernmentdecidedsuchbehaviourwasnotappropriateandpassedalaw(declaring)robotsshouldnotleavethehouse.这里为什么用declare的进行时态啊?

题目详情
After a while the government decided such behaviour was not appropriate and passed a law (declaring) robots should not leave the house.
这里为什么用declare的进行时态啊?
▼优质解答
答案和解析
很简单,.appropriate and passed a law 后面原句因该是 the government declare robots should not leave the house.但这是两个句子呀,因此要连成一个句子就需要去掉相同的主语,再将谓语动词变成现在分词,这里不是进行时的意思,明白了吗