I guess it is because many of the compulsory measures to fight air pollution have come to an end.have come to an end是句子中的什么成分?句子如何翻译?

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I guess it is because many of the compulsory measures to fight air pollution have come to an end.
have come to an end是句子中的什么成分?句子如何翻译?

我猜测 :是因为很多打击行境污染的强制措施使得污染最重走向终结;
have come to an end 走向终结
have come to 谓语 the end 宾语

我想是因为许多应对大气污染的强制性措施已经结束了。
have come to an end 作 后面从句中的谓语,即:
compulsory measures have come to an end

我想是因为许多针对大气污染的强制性措施已经取消了。
这里面because引导从句,have come to an end 是从句里的复合谓语成分。

have come to an end 在many of the compulsory measures to fight air pollution have come to an end 中充当谓语部分。而句子的主干是it is because (that)。I guess 是句子的插入语。
翻译:我想是因为许多抵制空气污染的强制措施已经结束了。