条件・譲歩N1
〜てもともとだ
there's nothing to lose by... / might as well try...
Structure
V-て形 + もともとだ
Explanation
V-te + もともとだ: no loss even if it fails, so it is worth trying.
Examples
断られてもともとだ。思い切って頼んでみよう。
Being refused would be no loss, so let's just ask boldly.
当たらなくてもともとだから、宝くじを買ってみよう。
There's nothing to lose if it doesn't win, so let's buy a lottery ticket.
Note
No loss even if it fails, so worth trying. Opposite of に越したことはない.
Related Grammar
〜に越したことはない〜ても損はない