他有个

he has a

→ 他
phrase Rare #13,944
he has a 个 is a general measure word that comes before the noun.
CH: 他有个妹妹。
EN: He has a younger sister.

他有个母亲

He has a mother.

— 巴克劳 (2019)

他有个哥哥

He has an older brother.

— 浪潮 (2008)

他有个理论如果你发现一件完美的事物或是地方或是人你就该坚持很蠢吧

He has this theory that if you find something—or somewhere or someone—perfect, you should stick with it. Pretty stupid, right?

— 蝴蝶梦 (1940)

他有个大家庭。

He has a large family.

他有个装满草莓的篮子。

He has a basket full of strawberries.

他有个打字机

He has a typewriter.

— 恶魔 (1955)

见过一次,他经常不在家回来就进书房,我还没找到机会他有个秘书,姓张什么名字?

I've only met him once. He's often away, and when he gets home, he goes straight into his study. I haven't had a chance yet. He has a secretary surnamed Zhang—what's her first name?

— 色‧戒 (2007)

他有个文凭

He has a diploma.

— 东京物语 (1953)

他有个关于男人迷恋“那话儿”尺寸的理论

He has a theory about men’s obsession with penis size.

— 泰坦尼克号 (1997)