will be able to 和 will have to 的区别和用法
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will be able to 和 will have to 的区别和用法
will be able to 和 will have to 的区别和用法
will be able to 和 will have to 的区别和用法
首先讲一下will have to是have to 的将来式.
I’ll have to...=It will be necessary for me to...
i.e.It will be necessary for them to pass a special test.=They will have to pass a special test.
be able to
a.位于助动词后.
b.情态动词后.
c.表示过去某时刻动作时.
d.用于句首表示条件.
e.表示成功地做了某事时,只能用was/were able to,不能用could.
He was able to flee Europe before the war broke out.
= He managed to flee Europe before the war broke out.
前者是有能力做,可以做,自愿的 后者是必须的,强制性的意味
will be able to:能够,强调的是一种能力。例如When you earn your keep, you will be able to do many things that your parents cannot。(当你自食其力,你能做许多你父母不会的事 )
will have to:不得不,表强制性。例如:I have to answer the question(我不得不回答那个问题)