Question

我感觉非谓语动词好难学

谁能告诉我分别什么时候用 to do ,doing,归纳一下它们在主并定状补的用法

Answer 1

以下动词后，一般只能加不定式作宾语。如：agree,ask,aim,arrange,choose,decide,demand,expect,fail ,help,hope,lean,long,manage,offer,plan,prepare,pretend,promise,refuse,wish等，这些词大部分可接that引导的从句。如：
I decided to ask for my money back. ＝I decided that I would ask for my money back.
When our visit to the farm was over,we expected to startback on foot. ＝When our visit to the farm was over, we expected that wewould start back on foot.

以下动词后，一般加动名词作宾语，如：admit,appreciate,consider,delay,enjoy,finish,keep,imagine,mind,miss,practise,resist,risk,save,suggest,don't mind,give up,insist on, put off等。如：
I suggest spending our summer vacation in a seaside town.
You must give up smoking, for it does too much harm toyour health.