题目：An old man sat quietly in the corner.要求：fronting前置
答案：In the corner an old man sat quietly.
我想请问为什么这里不能将谓语动词前置，构成全部倒装：
In the corner sat an old man
quietly.
难道an old man是个无关紧要的主语信息？
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The ancestors of these animals already had a circulation system, and
they were mobile, so that they could move to water to drink.请问老师这个move to drink不定式状语是目的还是宾语？
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