be delighted at, be delighted with, delight in 和 be delighted to do 之间有什么区别?
在 be delighted at 之中, at 表示“刺激因素”, be delighted at 表示刺激因素与感情反应之间的关系。
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We were delighted at your success. (GPU) 我们对你的成功感到高兴。
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I was delighted at the thought of seeing you again. (Maugham) 一想到能再次见到你,我就非常高兴。
be delighted with(喜欢)之后可以跟表物的词,也可以跟表人的词:
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She was delighted with her new outfit. (Crews) 她很喜欢她的全套新用品。
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Papa is delighted with him, because he is tidy. (Shaw) 爸爸很喜欢他，因为他很整洁。
delight in 表示“喜欢做某事”（其中 delight 为不及物动词，in 为介词；delight in 不能用于被动语态）：
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He delighted in sailing. (Crews) 他喜欢航海。
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She delighted in her work. (Priestley) 她喜欢她的工作。
在 be delighted to do 结构中, 带 to 的动词不定式表示感情反应的原因:
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We were all delighted to receive your letter. (Greene) 收到你的来信,我们大家都很高兴。
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I was delighted to hear the news of your success. 我听到你获得成功的消息, 非常高兴。