study作為名詞可數嗎

例句：

How long have you been studying English? 你學英語多久了？

My brother studied at the Royal College of Art. 我哥哥曾就學於皇家美術學院。

He studied her face thoughtfully. 他一邊端詳她的臉，一邊沉思。

Fran was studying the menu. 弗蘭在仔細地看菜單。

We will study the report carefully before making a decision. 我們將認真研究這份報告，然後再作決定。