watch-watches-makingmake-makestudy-studies-studies-studyswim-swim-swimmingbuy-buys-buyingcarry-2,過去式:買來的；；往期分詞:已買,buyn.購買v.示例及用法:是sagoodbuyatthatprice,錢不能buy幸福。1、“buy”的過去式和過去分詞分別是什么?過去式:買來的；；往期分詞:已買。buy英美vt買，買；交易、買賣；廉價商品；足夠支付；買通；買通；行賄；hecouldnottafferdtob...