東京にはこれまで何度も行ったことがある。

• I have been to Tokyo many times.

• I went to Tokyo many times.

五年前に東京に行ったことがある。

• I have been to Tokyo five years ago.

• I went to Tokyo five years ago.

小学生のとき彼のことを知っていた。

• I knew him when I was in elementary school.

• I've known him since I was in elementary school.

小学生の頃から彼を知っている。

• I've known him since I was in elementary school.

• I knew him since I was in elementary school.

中学の時からずっと英語を勉強している。

• I'm studying English since I was a junior high school student.

• I've been studying English since I was a junior high school student.

田舎暮らしがしたいと長年思っている。

• I wanted to live in a countryside for a long time.

• I've wanted to live in a countryside for a long time.

田舎暮らしがしたいと思っていたが、もういいや。

• I've wanted to live in a countryside, but I don't think so.

• I wanted to live in a countryside, but I don't think so.