be careful的各種搭配：

　　1.be careful后跟about

　　be careful about sth講究，小心，當心；慎重的，注意...的；對...小心

　　be careful about doing sth 慎重、小心、當心做某事

　　2.be careful后跟of

　　be careful of sth愛護、關切、掛念、呵護；當心、留意、注意

　　be careful of the traffic. 注意交通安全。

　　be careful of/as to wh-從句（of在后接wh-從句時常省略）

　　3.be careful后跟with

　　be careful with 小心處理；對…謹慎 ；節(jié)儉的、節(jié)省的

　　be careful with the/your money花錢精打細算；吝嗇、小氣

　　be careful with小心火

　　4.be careful for關心、惦記

　　5.be careful in...在...方面、過程中小心、注意