of speaking and,and后是加动词ing形式还是加原形

问题描述:

of speaking and,and后是加动词ing形式还是加原形

动词Ing,and加并列成分

加ing ,and加与speaking一样状态的并列成分

不一定,要看是跟哪个动词并列
例如:I think of speaking and writing.(l想两件事)
I think of speaking and write a letter.(想一件事、做另一件事)