我认识他
Wǒ rènshí tā
I know him.
这个字我认识
Zhège zì wǒ rènshí
I recognize this character.
很高兴认识你
Hěn gāoxìng rènshí nǐ
Nice to meet you.
我刚认识他
Wǒ gāng rènshí tā
I just met him.
