【从方框内选择合适的短语并用其适当形式完成句子。at】在英语学习中，掌握常用短语的正确使用方式是非常重要的。尤其是在完成句子这类练习中，考生需要根据上下文选择合适的短语，并将其转换为正确的语法形式。以下是一些常见的与“at”相关的短语及其用法总结。
一、常见短语及用法总结
| 短语 | 词性 | 含义 | 例句 |
| at once | 副词 | 立刻，马上 | He asked me to leave at once. |
| at first | 副词 | 起初 | At first, I didn’t understand the question. |
| at last | 副词 | 最后 | We arrived at last after a long journey. |
| at the same time | 短语 | 同时 | She is studying English at the same time as working. |
| at least | 副词 | 至少 | You need to study at least two hours a day. |
| at most | 副词 | 至多 | There are at most five people in the room. |
| at risk | 短语 | 处于危险中 | The child is at risk of getting sick. |
| at work | 短语 | 在工作 | He is at work now. |
| at hand | 短语 | 在手边，附近 | The book is at hand. |
| at a loss | 短语 | 困惑，不知所措 | I was at a loss what to do next. |
二、使用建议
1. 理解语境：在选择短语时，要结合句子的整体意思，判断哪个短语最符合逻辑。
2. 注意词性变化：部分短语可能需要根据句子结构进行调整，如副词、介词短语等。
3. 积累常用搭配：熟练掌握“at”开头的常用短语有助于提高写作和阅读能力。
通过不断练习和积累，学生可以更灵活地运用这些短语，提升语言表达的准确性和自然度。
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