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
Kare ga usotsuki da to sureba, sono hanashi wa shinjirarenai.
If he’s a liar, then his story can’t be believed.
Anata ga issho ni iku to sureba, watashi mo ikimasu.
If you are going, I'll go too.
Kare ga uwaki shite iru to sureba, dou sureba ii?
If he’s cheating, what should I do?
Sono kusuri ga kikanai to sureba, hoka no houhou o tamesu beki da.
If that medicine doesn’t work, we should try something else.
Practice
Grammar content sourced from hanabira.org.