Translation of "Dentist's" in Chinese

Today I went to the dentist's.

今天我去看了牙医。

You had better go to the dentist's.

你最好去看牙醫。

You don't need to go to the dentist's.

你不需要去看牙医。

I had my teeth examined at the dentist's.

我在牙医那儿检查了牙齿。

- You had better go to the dentist's.
- You had better go to the dentist.
- You should go to the dentist.
- You'd better go to the dentist.

你最好去看牙醫。