Q: Sentence (1) To fall a tree.
Sentence (2) He fell to his knees.. Word: fall.
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A: different meanings

Q: Sentence (1) He doesn't know how to use a computer.
Sentence (2) Use this knife to slice the bread.. Word: use.
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A: the same meaning

Q: Sentence (1) I want to see results.
Sentence (2) The 1960's saw the rebellion of the younger generation against established traditions.. Word: see.
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A:
the same meaning