Not a cloud can be seen in the sky 其中not的词性?

Not a cloud can be seen in the sky 其中not的词性?

not 在这里不是副词吧? 修饰a cloud 吗?

not 放在句首 要注意什么?
not 开头 但是后面没有倒装啊?

Man is not made for defeat,A man can not be destoryed bui not defeated! who can not see a when he goes to hospital What match can not be put in a match box? We can not judge a person by his look can not focus a disabled or invisible window it can buy you a position but not respect 是什么意思？ A wise man care not for what he can not have I can(not) imagine that they could (not) finish it in such a short time A bird can roost but on one branch,a mouse can drink not more than its fill from a river. “He is a fool who can not be angry, but he is really a wise man who will not.”