語氣 (Mood)

語氣是動詞的一種形式，它是用來表示說話者的情緒或態度，英文裡的動詞有三種不同的語氣：

1. 直述語氣 — 陳述事實、表達否定或提出詢問

It is very cold today.

I cannot imagine what will happen next.

How often do you play tennis?

2. 祈使語氣 — 表達請求、命令、忠告或禁止

Please take a number.

Alex, do your homework now.

Be careful!

Don't talk so loud.

3. 假設語氣 — 表示命令、建議、祈望、或與現在事實相反的假設

I wish that he were here now.

If I were taller, I would have been a professional basketball player.

資料來源: 基礎實用文法