be careful to do sth和be careful(not) to do sth的用法如题求教

be careful to do sth造句 be careful to do sth和be careful(not) to do sth的用法如题了, be careful to do sth和be careful(not) to do sth的用法如题求教 be careful to do STh否定句be careful not doSTh为何不可以是don,t be careful to do STh.另外don,t careful to do STh对吗? be careful doing和be careful to do的区别? 1,look forward to doing sth.2,hope to do sth1,look forward to doing sth.2,hope to do sth 3,promise to do 4.leave sth+地点 5.huhdreds of 6.make sth+形容词 7,elsr 8,sb spewd fime on sth 9.be careful with sth 10.be heady to do sth 每一个造一 be sure to do sth. be pleased to do sth be able to do sth be going to do sth be let to do sth? be sad to do sth. be made to do sth be obliged to do sth. be used to do sth. be to do sth和will do sth的区别 be worth to do sth 还是be worth doing sth be scared to do sth还是be scared doing sth