I've had a few ideas.
いくつか思いついたことがある
I've had enough problems.
苦労はもうたくさんだ
I've had it (up to here) with him.
あいつにはもう我慢ならない
I've had quite enough.
十分いただきました
I've heard so much about you.
おうわさはかねがね伺っています
I've just been to the bank.
銀行へ行ってきたところだ
I've just had a phone call from my brother.
弟から今電話があったところだ
I've known her for years.
彼女と長年付き合っている
I've lived over this shop for years.
長年この店の上に住んでいる
I've made up my mind to buy that car.
あの車を買うことに決めた