もいいくらい
(Mo ii kurai)
enough to / to the extent that (you could).
Connection rules
- +V-て + もいいくらい.
- +Hyperbolic degree — 'enough to do X / to the extent that'.
- +Often used emphatically: 感謝してもしきれないくらい ('so grateful I can't thank you enough').
Examples
1.
泣いてもいいくらい感動した。

Nai te mo ii kurai kandou shi ta.
I was moved enough that I could have cried.
「enough to / to the extent that (you could)」
2.
叫んでもいいくらい嬉しかった。

Saken de mo ii kurai ureshika ta.
I was so happy I could have shouted.
「enough to / to the extent that (you could)」
Practice
I was so happy that I felt like I could die.
あまりにも嬉しくて、___幸せだった。
Romaji also accepted