we should smile friendly 对吗

问题描述:

we should smile friendly 对吗

不对。friendly是形容词。可以改为 We should give a friendly smile.

不对 应该改为
we should smile friendlily

We should give a friendly smile

friendly是形容词,不可以修饰动词。
这句话可以改一改:
We should have a friendly smile to others.