toothbrush可数吗

He has refused to let me use his toothbrush.

他拒绝让我使用他的牙刷。

Use a toothbrush on your tongue as well, and rinse your mouth frequently.

舌头也要用牙刷清洁，并且经常漱口。

As soon as the bristles on your toothbrush begin to wear, throw it out.

牙刷毛一开始磨损，就把它扔掉。

The use of a toothbrush to keep tartar down is very helpful.

使用牙刷去除牙垢很有帮助。

Have you brought your toothbrush with you?

你带牙刷来了吗？