Question

It's very difficult question 后面跟to do还是doing？

It's very difficult question 后面跟to do还是doing。

Answer 1

1. 解答: 这里应该后接动词不定式，充当名词question的后置定语。例如it's a very difficult question to help old people to use smart phones in life. 帮助老年人在生活中使用智能机是一个难题。
2. 语法: 动词不定式是非谓语动词的一种，可以充当主语、宾语、表语、定语和状语。从语法功能上考察，它相当于一个独立的名词、形容词或副词。现在分词也是三大非谓语动词中重要的一种，但它多表示与主句谓语同时的动作，更多的用来充当伴随状语或补足语。
3. 例句:
① I have a lot of work to do. 我有很多工作要做。（不定式充当定语）
② Taking a dictionary, she began to prepare her lessons. 她拿了一本词典开始准备功课。（现在分词充当伴随状语。）
③ Mr. white got up very early in order to catch the early bus. 怀特先生早早起床，目的是想要赶上早班车。（动词不定式充当状语。）
④ When I entered the room, I found her writing something. 我进屋子时，发现她在写东西。（现在分词短语充当宾语补足语。）

Answer 2

对于question 用 to answer.
It is a very difficult question to answer.
意思是：
那是一个很难回答的问题。