彼は走るのが

he … running

→ 彼
phrase Rare #45,302
he … running This fragment introduces running as the subject of what follows; the English wording depends on the predicate, as in “he likes running” or “he is fast at running.”
JA: 彼は走るのが苦手です。
EN: He is bad at running.

彼は走るのがとても速い。

He runs very fast.

彼は走るのが好きだ。

He likes running.

彼は走るのが大嫌いなんだ。

He absolutely hates running.