In such dry weather ,the flowers will have to be watered if they ____.

题目

In such dry weather ,the flowers will have to be watered if they ____.
In such dry weather ,the flowers will have to be watered if they ____.
A.are to survive B.will survive
为什么是be to do ,不是will
花打算要生存下去?
花将要生存下去?
看不出来有什么区别,要说be to do 是打算,will 是意愿,我觉得打算也是一种意愿.

答案

be to do可以表示将要,想要的意思.Will只是将要.        一般说来,“be to do” 这个结构有两种语法意义,其一是连系动词be+动词不定式做表语,其二是be to是一个独立词汇单位,具...