单数复数都可以，但是搭配要正确：I have never seen any gorilla/【gorillas可数名词，复数更常用】 before.orI have never seen a gorilla before.orI have never seen gorillas before. 祝你开心如意！
We had never seen any gorilla before. 用单数就好。还没见过一只大猩猩
We have never met each other.1.Whatever happens2.He left home at lease 10 years ago.
thoughwedidn'tmeeteachotherbefore
although we haven't met before
We never seen each other thought.
1.我们一直没见过面We haven't seen each other2.无论发生什么情况No matter what happenes3.自从他十年前离开了家Since he left home ten years ago
we haven't seen each other before~no matter what happens since he left home 10 years ago
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薰衣草恋人
