SuGoiSuす語彙すGrammar › N2 · 01 Conditions and hypotheticals
〜とすれば: if we assume; supposing
N2 · 01 Conditions and hypotheticals
Reasons from an assumption: if this is so, then this follows.
Plain form + とすれば. The assumption is hypothetical or unconfirmed, and the second half is a conclusion or judgment (〜だろう, 〜はずだ, 〜べきだ). A little more formal than 〜としたら. 〜とすると is nearly the same.
Examples
犯人が内部の人間だとすれば、説明がつく。
If the culprit is someone on the inside, that would explain it.
今から行くとすれば、九時には着くだろう。
If we leave now, we will probably arrive by nine.