I hope... / I wish... / If only...
Expresses a strong wish. Always followed by subjunctive. Ojalá + present subjunctive = I hope (possible). Ojalá + imperfect subjunctive = I wish (unlikely).
I hope you arrive on time.
I wish I could go with you, but I can't.
—Do you think there'll be a solution? —I hope so.
I wish it wouldn't rain.
If only I could help you.