第一次

这是我第一次见到他。

zhè shì wǒ dì yī cì jiàn dào tā.

This is the first time I meet him.

这是我第一次参加跳远比赛。

zhè shì wǒ dì yī cì cān jiā tiào yuǎn bǐ sài.

This is the first time I participated in the long jump competition.

这是他第一次参加正式比赛。

zhè shì tā dì yī cì cān jiā zhèng shì bǐ sài.

This is the first time he has participated in an official competition.