I think my life would be boring if I didn't study English.
I don't think my life would be nearly as interesting if I didn't study English.
ーI think my life would be boring if I didn't study English.
「もし英語を勉強していなかったら、私の人生はつまらなかっただろう」
boring で「退屈な」
to study English で「英語を勉強する」
ーI don't think my life would be nearly as interesting if I didn't study English.
「英語を勉強していなかったら、私の人生はこんなに面白くなかっただろう」
not nearly as ... で「全く…でない・…とは程遠い」
ご参考まで!
If I hadn't started learning English, my life would have been boring.
If I hadn't started learning English, my life would have been boring.
If I hadn't started learning English,: 『もし私が英語学習を始めていなかったら』という意味です。
my life would have been boring.: 『私の人生はつまらなかっただろう』という意味です。