这句话的英语语法问题To change the situation ,some effective measures s

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这句话的英语语法问题
To change the situation ,some effective measures should be taken before things get worse .为了改变这种情况,在事态进一步恶化之前必须采取有效措施.
句子的主语和逻辑主语是否必须一致?
请具体分析.
请看清，我的问题是：change the situation 的逻辑主语是什么？（也就是动作执行者是谁）我知道是“某人”
按照英语语法，逻辑主语是不是必须与句子主语一致？我写的句子，逻辑主语是“某人”，而句子主语是“some effective measures 是不是我写的句子存在语法错误？

此句可改写为some effective measures should be taken to change the situation before things get worse,句子的主语是measures.measures的逻辑主语是采取有效措施的人.someone take some effective measures to change the situation.to change the situation 是目的状语.
再问：是的，你说的非常正确，分析得非常到位。我想问一下，Some effective measures should be takento change the situation before things get worse 到底有没有错？
再答：没错，但是不好。语法点是非谓语动词做目的状语的用法，一般高中语法书里就有，将目的状语提前是为了使句子看起来更加匀称。

这句话的英语语法问题To change the situation ,some effective measures s 这句话对吗The situation is easy to change if you take my advise. take effective measures to do sth.是什么意思? 英语翻译But the situation is gradually beginning to change.Studi Is is time to change the present situation是什么意思 Barack Obama promised to change the present situation in Ame i then advised to change the situation翻译 We should urge the government to take some ( ) measures to ( the government has taken some measures to solve the shortage China has (taken some measures )to control the population we must take some measures to prevent the environment being 英语翻译1.Consequently,to solve the problem,some measures should