～とすれば (～to sureba)
Explanation
Used to express 'if it were the case that...', 'if we assume that...'.
Formation
Verb-casual + とすれば / い-Adjective + とすれば / な-Adjective + だとすれば / Noun + だとすれば
Detailed Explanation
The ～とすれば grammar point poses a hypothetical condition and then draws a conclusion or inference. It translates as 'if we suppose/assume that...' or 'if it is the case that...'.
Examples
彼が嘘つきだとすれば、その話は信じられない。
Kare ga usotsuki da to sureba, sono hanashi wa shinjirarenai.
If he’s a liar, then his story can’t be believed.
あなたが一緒に行くとすれば、私も行きます。
Anata ga issho ni iku to sureba, watashi mo ikimasu.
If you are going, I'll go too.
彼が浮気しているとすれば、どうすればいい？
Kare ga uwaki shite iru to sureba, dou sureba ii?
If he’s cheating, what should I do?
その薬が効かないとすれば、他の方法を試すべきだ。
Sono kusuri ga kikanai to sureba, hoka no houhou o tamesu beki da.
If that medicine doesn’t work, we should try something else.
Grammar content sourced from hanabira.org.