が一人もいない

not a single person

→ が

phrase Rare #29,188

not a single person Used with a negative expression to say that there is not even one person. 一人も is used for people and is followed by a negative form. 居ねえ and 居ない are informal and formal/neutral variants, respectively.

JA: この町には医者が一人もいない。

EN: There isn't a single doctor in this town.

私にはガールフレンドが一人もいない。

I don't have a single girlfriend.

彼には友達が一人もいない。

He doesn't have a single friend.

彼には自分を継承してくれる子供が一人もいない。

He doesn't have a single child to carry on his legacy.

トムには友達が一人もいない。

Tom doesn't have any friends.