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listen for怎么用?

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listen for怎么用?
新概念3册35课有这么一句:
They located the right chimney by tapping the walls and listening for the man's cries. 中的listening for 可不可以换成listening to?为什么?
listen for:
注意倾听(期待的声音等)

例句与用法:
1. She shouted on the mountaintop and listened for the echo.
她在山顶上大声喊着,然后聆听着回声.

2. For over two hours, her arrival had been listened for.
足足有两个多小时,人们一直等待着听她到来的声响.