The question is difficult to answer.这个句子中,to answer在句中作状语修饰difficult 并与之构成形容词词组(be)difficult to answer在句中作表语。(the question 实际上做answer的逻辑宾语) 再如: The sentence is easy to translate.这个句子容易翻译。 ...
to answer 作difficult的补语。你可以把它作为一个句型来掌握。 sth be+形容词+to do.=It's +形容词+ to do sth. 如:这两自行车很难修理。 The bike is difficult to repair.=It is difficult to repair the bike. 祝你进步!
你好。在你的句子裏面,to answer做“主语补足语”。 ==It is difficult to answer the question.-------看下面语法分析: It(形式主语) is (系动词)difficult(表语) to answer the question(真正主语) 所以,是动词不定式做主语。