高中英语非谓语动词问题做的很多选择题和填空题的非谓语动词都应该填什么?to do 和doing分不清,尤其是句首应该填什么?什么时候该用什么形式,请详细说明一下（最好以上问题都带着例子,因为临时举不出来）.无限感激!

非谓语动词主要包括不定式、动名词和现在分词。为了区分这三种不同的非谓语动词的用法和含义，我们将分别从三种非谓语动词在句子中做主语、宾语、宾语补足语、定语、状语、表语以及一些特殊结构句型等角度来区分其用法和细微含义。
1．不定式和动名词作主语的区别
(1)动名词作主语通常表示抽象动作；而不定式作主语表示具体动作。
Smoking is prohibited(禁止)here．这里禁止抽烟。(抽象)
It is not very good for you to smoke so much．你抽这么多烟对你身体很不好。(具体)
(2)动名词作主语时，通常用以表示一件已知的事或经验。
不定式短语通常用来表示一件未完成的事或目的。
Climbing mountains is interesting．爬山很有趣。(经验)
Driving a car during the rush hour is tiring．在高峰时刻开车令人厌烦。(经验)
(3）不定式做主语，一般用it当形式主语，把作主语的不定式短语后置。
It took me only five minutes to finish the job.

如果是做状语就看跟句子主语的关系,主动就用doing,被动用done 如果此动作发生在谓语动词动作之前,主动就用 having done;被动可用having been done 也可用done .放在句首的通常是状语；也有可能是做主语.如：
Hearing the news,he jumped with high.(伴随状语）
Having finished the homework,he went out playing.(先完成作业又出去玩所以用完成形式）
Exposing yourself to the sunsight,you will get your skin burnt.(you 跟expose 主动关系）
Exposed to the sunsight,you will get your skin burnt.(you 跟expose 被动关系）
Being exposed to the sunsight will get your skin burnt.（动名词做主语）
（后三个例句较难理解,但是很典型）
如果是做定语就看它跟所修饰的名词或代词的关系
We have moved into the house built.（已经建成的）
We will move to the house being built.（正在被建的）
We will move into the house to be built.（将要被建的） （这三个都是被动形式的）
The man speaking on the platform now is my father.(the man 与speak 是主动关系）
如果是做宾语补足语,就看跟宾语的关系（有时需要记准个别单词的用法）
I can't get the car going.(让...一直干）
I can't get the task finished tomorrow.
I will get my friend to finish the task.
With a lot of work to do,I can't go out now.
With all the work finished,I can go out now.
With my mom helping me,I can go out now.