【allow和allowed的用法】在英语学习中,"allow" 和 "allowed" 是两个常见但容易混淆的词。它们都与“允许”有关,但在使用时有明显的区别。以下是对这两个词的详细总结,帮助你更好地理解它们的用法。
一、基本含义
单词 | 含义 | 词性 |
allow | 允许、准许 | 动词 |
allowed | 被允许的、被准许的 | 过去分词/形容词 |
二、用法对比
项目 | allow | allowed |
词性 | 动词 | 过去分词 / 形容词 |
时态 | 一般现在时(单数第三人称) | 一般过去时或被动语态 |
用法 | 表示主动给予许可 | 表示被动接受许可 |
例句 | The teacher allows us to leave early. | The students were allowed to go outside. |
结构 | allow + 宾语 + 动词原形 | be + allowed + 动词原形 |
三、常见搭配与结构
1. allow + 宾语 + 动词原形
- She allows her son to play video games after homework.
- They allow visitors to enter the building.
2. allow + 宾语 + doing
- The rule allows smoking in the garden.
- I allow my dog to run in the park.
3. be allowed + to do
- You are allowed to use the computer during class.
- He was allowed to leave early.
4. be allowed + doing
- The use of mobile phones is allowed in this area.
- This type of behavior is not allowed.
四、注意事项
- allow 是一个及物动词,后面必须接宾语。
- allowed 可以是动词的过去分词,也可以作形容词使用,表示“被允许的”。
- 在被动语态中,allowed 常用于描述某种状态或规定。
五、总结
项目 | allow | allowed |
词性 | 动词 | 过去分词 / 形容词 |
主动/被动 | 主动动作 | 被动状态 |
常见结构 | allow + 宾语 + to do / doing | be + allowed + to do / doing |
例句 | Teachers allow students to ask questions. | Students are allowed to ask questions. |
通过以上对比和总结,你可以更清晰地掌握 allow 和 allowed 的不同用法,避免在写作或口语中出现错误。