the best way to do sth is后加doing还是to do?

the best way to do sth is后加doing还是to do?
the best way to do sth is后加doing还是to do?

the best way to do sth is后加doing还是to do?
都可以的 此处is 引导的是表语

is 后面是一个表语。所以doing和to do都可以。

doing啦，is后加表语，要名词性的

to do 动词不定式做定语