英语选择问题Theprofessorspokeveryclearlytomakehisspeecheasy＿.A.understoodB.understandC.understandingD.tounderstand选什么?为什么?为什么不能是被动形式呢(⊙⊙?)

Question

英语选择问题
The professor spoke very clearly to make his speech easy＿.
A.understood B.understand C.understanding D.to understand
选什么?为什么?
为什么不能是被动形式呢(⊙_⊙?)

Answer 1

D
这是是主动表示被动的用法...
不定式修饰作表语和宾语补足语的形容词时,结构：主语+系动词+形容词 + 不定式； 动词+宾语+形容词+不定式.如果形容词是表示难易、利弊等含义,如
difficult,easy,comfortable(舒适的),convenient（便利的,方便的),hard,cheap,expensive,等,不定式用主动表被动.
The question is difficult to answer.这个问题很难回答.
The work is easy to do.这项工作很好做.
I found the car comfortable to ride in.我觉得这种车很好坐.
That makes poetry difficult to write.那就使得诗很难写.