这涉及sure的用法:常用到的2种结构:be sure to do 和 be sure +that 从句.当be sure +that 从句结构中主句和从句的主语一致(即指同一人或物,一定注意这条件,不一致不行)的时候,可以将其转换成be sure to do 结构. 例子: I am sure that I can pass the exam.(我确定我能通过考试)=I am sur...
I am sure to work out the maths problem.(be sure to do sth.多指别人认为主语能完成的事,所以这个用法在这里不好。) 最好是用 I am sure of working out the maths problem.(be sure of doing sth.多指主语认为自己能完成的事)