at

介詞 prep.

1.在...地點

They were already waiting at the gate when I got there.

當我到達那裡時,他們已等候在門口了.

2.在...時刻

Jane will meet her boy friend at Christmas.

簡將在聖誕節和她男友見面.

3.向,朝,對著

Don"t shout at me.

別對我叫喊.

4.在...方面

He is an expert at troubleshooting.

他是位排解爭端的能手.

5.因為,由於

I woke at the sound of the bell.

隨著鈴響,我醒了.

6.從事於,忙於

He is working hard at this thesis.

他正在努力地撰寫論文.

7.以(某種價格、速度等)

They sold the cloth at a dollar a yard.

他們以每碼一元的價格出售這種布.