careful，carefully都是小心的意思，前者是形容詞,作定語或表語。後者是副詞,作狀語,修飾動詞或整個句子。
壹、careful詞匯分析音標：英 [?ke?fl] ? 美 [?kerfl]?
釋義：仔細的，小心的;周到的;慎;心細
1、You must be careful when handling chemicals.
接觸化學藥品必須小心謹慎。
2、Be careful of the traffic.
註意交通安全。
3、Please be careful with my glasses (= Don't break them) .
請當心別打碎我的眼鏡。
4、Be careful you don't bump your head.
留神別撞了頭。
二、carefully詞匯分析音標：英 ['ke?f?l?] ? 美 [?k?rf?l?] ?
釋義：仔細地;小心謹慎地;警惕地;周密地
1、He?is?a?slippery?customer,?and?should?be?carefully?watched.?
他是壹個狡猾的顧客，要小心提防。
2、Liz?drew?the?word?out?carefully.?
莉茲小心翼翼地說出了那個詞。
3、All?through?lunch?he?had?carefully?avoided?the?subject?of?the?house.?
整個午飯期間，他壹直在小心翼翼地回避房子的話題。
4、They?are?carefully?graded.?
它們被仔細地分成各種級別。