cayeses

form-of imperfect second-person singular subjunctive

caerの二人称単数過去接続法未完了形

English Meaning

second-person singular imperfect subjunctive of caer

Si cayeses desde el puente, podrías lastimarte gravemente.

もしあなたが橋から落ちたなら、ひどい怪我をするかもしれません。

If you were to fall from the bridge, you could seriously injure yourself.