[Grammar] Short response

* He is nice and so is she.
   He is nice and she is too.
- "so" 是adv，要倒裝; "so" 不是conj.，要加 "and"
- "too" 通常放句尾，不用倒裝


* 否定詞放句首要倒裝
Never have I seen .....


* 一般動詞倒裝，要用助動詞倒裝
He came and so did she.
He came and she did (come) too.


* 另一用法
A: He is stupid.
B: So he is. (對耶，他是笨的)

A: You can do it.
B: So I can. (對耶，我可以做到)



* either, neither, nor
"nor" 是conj. ，"neither" 不是conj，所以需要 "and" 來連接子句
He isn't nice and neither is she.
= He isn't nice nor is she.
= He isn't nice and she isn't, either.

He wasn't going home and neither was she.
= He wasn't going home nor was she.
= He wasn't going home and she wasn't, either.

He never tells a lie and neither does she.
= He never tells a lie nor does she.
= He never tells a lie and she doesn't, either.


* also 用在肯定句, also在be /助動詞後面，但在一般動詞前
He has a pen and she also has one. (這裡的has是一般動詞)