核心问题
A: He threw the ball to his sister. (ALD)
B: The boy threw a stone at the dog. (Crowell)
为什么在句 A 中使用介词 to, 而在句 B 中使用介词 at?
词典解答
throw to 是指“把……扔(掷)给某人”，不含恶意(例如在运动或游戏中)。而 throw at 则是指“生气地或有恶意地将某物抛向某人”。请对比下列句子：
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Please throw the ball to me. (JED) 请把球扔给我。
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“That's enough,” she shouted, and threw her heavy powder jar at him, barely missing his head. “够了，”她喊道，把她的大粉罐向他扔了过去，差点砸着他的头。
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He threw an angry look at me. (Palmer) 他向我抛了一个生气的眼神。
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That boy is always throwing stones at birds. (LEG) 那个孩子老是用石头打鸟。