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
答
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）