be sure to 和be certain
be sure to 和be certain
半助动词 be certain to be sure to 的区别
be certain to do 和be sure to do 的区别
make sure to do sth、be sure of sth、be sure that 、be certain
be. sure. that.. 和 be certain that .. 哪个对?
be sure of 和 be sure to
be sure of和make sure of还有make certain of和be certain of的区别?
Wait till you are more certain .It is better to be sure than
make sure to和 be sure to区别
to be honest,to be fair,to be sure,to be exact的意思和区别?
Be sure 和 make sure
sure的用法be sure of doing和 be sure to do有什么区别呀?