为什么是how to play而不是how to play it?

题目

为什么是how to play而不是how to play it?
how不是需要在末尾跟上宾语的吗?

答案

在前文提高过某件东西之后,我们可以省略.避免重复.for example:i have a piano but i don't know how to play区别 what to do 和 how to do it.what 是属于代词可以指代某样东西.所以what to do 后面不需要接某物how...