| 表示时间 | at first（开始时，最初） | At first Byrd and his men were able to take a great many photographs. |
|---|---|---|
| at once（马上，立刻） | Byrd at once ordered his men to throw out two heavy food sack. | |
| at present（目前，现在） | At any rate, I’m determined to stay here at present. | |
| at last（最后，终于） | After walking for several hours, we arrived at the village at last. | |
| at times（有时、偶尔） | He behaves very strange at times. | |
| at the moment（现在） | At the moment, he's in Madrid. | |
| 表示地点 | at home（在家） | Billy is not at home at present. |
| at school（在学校） | He's at school. | |
| 表示程度 | at least（至少） | At least, I’m not mad yet. |
| at any rate（不管怎样） | It's a pity you can't come to the concert. At any rate you' Il be able to hear it on the radio. | |
| 其它 | at heart（内心里，实际上） | Though he tried to made conversation with the lady, he wasn’t interested in her at heart. |
| at a loss（困惑不解，不知怎么办） | Why? I’m at a loss.I don't know what I can do about it. I' m completely at a loss. |
