【does和doesnt的使用区别】在英语学习中,"does" 和 "doesn't" 是非常常见的助动词,主要用于构成一般现在时的疑问句和否定句。虽然它们形式上只差一个“n”,但用法和语境却有明显区别。以下是对两者使用区别的总结。
一、基本定义
- does:是动词 "do" 的第三人称单数形式,用于肯定句和疑问句。
- doesn't:是 "does not" 的缩写形式,用于否定句。
二、主要区别总结
项目 | does | doesn't |
含义 | 表示“做”或“进行”,用于肯定句和疑问句 | 表示“不做”或“不进行”,用于否定句 |
主语 | 第三人称单数(he, she, it) | 第三人称单数(he, she, it) |
用法 | 肯定句、疑问句 | 否定句 |
例句 | He does his homework every day. | He doesn't like coffee. |
疑问句 | Does he go to school? | Does he not go to school?(更常用的是 doesn't) |
三、常见用法对比
1. 肯定句
- He does his homework.
- She does her job well.
2. 否定句
- He doesn't like sports.
- She doesn't speak French.
3. 疑问句
- Does he play football?
- Doesn't he know the answer?
四、使用注意事项
- 主语必须是第三人称单数,否则不能用 "does" 或 "doesn't"。例如:
- 正确:Does she like apples?
- 错误:Do she like apples?
- "doesn't" 是 "does not" 的缩写,在口语和书面语中都可以使用,但在正式写作中,有时会用完整形式 "does not"。
- 在疑问句中,"does" 和 "doesn't" 的位置通常在主语之前,形成倒装结构。
五、小结
项目 | does | doesn't |
类型 | 肯定/疑问 | 否定 |
主语 | he/she/it | he/she/it |
结构 | does + 动词原形 | doesn't + 动词原形 |
用途 | 肯定句、疑问句 | 否定句 |
通过以上对比可以看出,"does" 和 "doesn't" 的区别主要在于句子的肯定与否定,以及是否需要加上“not”。掌握这些区别,有助于提高英语表达的准确性与自然度。