not, neither, 放句首就一定倒装吗？

Question

如：Not all of his friends came to help him out of trouble.
谢谢了，最好能详细解释下 有举例更好~~~thanks
Neither of her parents wants her to become a doctor. 这个就是neither 放句首啊

Answer 1

否定或半否定副词置于句首 句子要完全倒装
所谓完全倒装 就是全部谓语要放在主语之前
你写的这两句话Not all of his friends 和Neither of her parents 都不是副词 所以不倒装
Not until twelve o'clock did she go to bed last night .
Seldom do I go to work by bus.
这两句才要倒装

Answer 2

Neither⋯⋯nor⋯⋯
前不倒，后倒
neither of my classmates took part in the English club, nor did the students of other classes.

Answer 3

not要neither不要