be good at 词性

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be good at 词性
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be good at 词性
be good at 词性

be good at 词性
be good at是个词组,不能说它的词性,拆开说可以,be是系动词,good是形容词,at是介词

是个短语 后面加doing sth

be good at 词性 be good at中的at是什么词性 be good at造句 用be good at be good at 造句 be good at+什么? Be good at+__ be good at be good at this be good at 和 be good with be good for,be good at, 用be good at造句. be good at 怎么用? be good at 等于什么? be good at的近义词 be good at scoring goals be good at的反义词? be good at=( )=( )