1) I met him three years back.

我三年前见过他。
2) I have seen him today.

今天我见过他。
3) I've seen pictures of him.

我见过他的照片。
4) I' ve met him on several occasions.

我见过他几次.
5) I have met him several times .

我见过他好几次。
6) I memorize that I has seen him.

我记得看见过他。
参考词条