英語分鐘可數還是不可數名詞

例句：

Can I interrupt you just for a minute?

我可不可以打斷你一會兒？

She stared stonily at him for a minute.

她冷冷地盯著他看了片刻。

The cost has gone up to $1.95 a minute.

價格已漲到了一分鐘$1.95。