be sure to do的主语是人还是it?

be sure to do的主语是人还是it? be sure of be sure to do 的区别· be sure to do 英语语法问题 be sure to do用法you are almost sure to get it这个be sure to do 中的 to do 是不定式短语作 sure的宾语吗?难道to do 是不定式短语作 sure的状语 祈使句时 是to be sure 还是 be sure make sure,be sure of ,be sure to do,for sure的区别 be sure to do的意思 need to be done的问题主语（人） need/want/require to do 主语（物） need/want/require doning那need to be done前面是人还是物啊? sure的用法be sure of doing和 be sure to do有什么区别呀? be sure to do sth. be intended to do 主语是人还是物,还有intend to do 和 be intended to do 的区别intend to do 是打算做某事 be intended to do 是用来做某事 那么不可能是人被用来做某事吧?、The residents approve of the measure__so far make sure 的用法make sure do 还是make sure to do …… 用Be sure to、Be sure to do 、Be sure of、Be sure that 造句 sth.be sure to (sure主语可以是事吗?)sth.be sure to 这个短语对吗?sure主语可以是事吗? be sure to do和be sure of doing 的区别be sure to do和be sure of doing的意义有什么不同 Do you have something to be taken?主语是you还是something? make sure to do 与be sure to do sth be adj to do...这里是个什么用法 to do作什么语,执行对象是主语本身?另外 be后面的adj又是用来修饰to do的还是sth本身的?