したい事がある

there is something I want to do

→ 為る
phrase Uncommon #19,053
there is something I want to do A natural way to say that you have something you want to do. したい means “want to do,” 事 turns the phrase into “something,” and ある means “there is.”
JA: 少ししたい事がある。
EN: There is something I want to do.

お願いしたい事があるのですが

I have a favor to ask.

少し忠告したい事がある

There's something I'd like to advise you about.

お話ししたい事があるんです

There's something I'd like to talk to you about.

— フィールド・オブ・ドリームス (1989)

何か弁明したい事があるなら明日聞いてやる

If you have anything to say for yourself, I’ll hear you out tomorrow.

— Article 15 (2019)

君に少し忠告したい事がある

There's something I'd like to advise you about.