forever friendship... 哪個比較正確?

第二個friendship forever

因為forever通常放在句子後面

^___________^

everlasting friendship比較好

"friends forever", where forever modifies the be-verb, as in

We will be friends forever.

If you need an adjective to go with friendship (n), I would suggest "eternal"

Melon dude is too serious about grammars.

Forever is also commonly used as adjective, as in "forever stamps".

也可以說 Our friendship will last forever
或者 Our friendship will never die
(( 玩具總動員歌曲"You've gota friend in me" 中有這句噢!!))