当心的英文表达有：be careful、take care、look out、watch out、beware1、be careful读音：英 [bi: ˈkɛəful] 美 [bi ˈkɛrfəl]n.注意；当心，小心Be careful she's not just using you 2、take care读音：英 [teik kɛə] 美 [tek kɛr]当心，小心；坚持到底Take care not to let these goods be rained on! 3、look out读音：英 [luk aut] 美 [lʊk aʊt]当心；向外看；面向； 朝外4、watch out读音：英 [wɔtʃ aut] 美 [wɑtʃ aʊt]当心;保持警觉We should watch out for those friends in disguise. 5、beware读音：英 [bɪ'weə(r)] 美 [bɪ'wer]v. 小心；谨防Beware what you do with this dangerous substance.摆弄这东西要小心。