“Can”的用法 can的四种用法

\u201ccan\u201d\u7684\u56db\u79cd\u7528\u6cd5

\u201ccan\u201d\u7684\u56db\u79cd\u7528\u6cd5\uff1a
\u8868\u793a"\u80fd\u3001\u4f1a"\uff0c\u6307\u8111\u529b\u6216\u4f53\u529b\u65b9\u9762\u7684"\u80fd\u529b"\u3002\u4f8b\u5982: I can speak English.\u6211\u4f1a\u8bb2\u82f1\u8bed\u3002
\u8868\u793a"\u53ef\u80fd",\u5e38\u7528\u4e8e\u5426\u5b9a\u53e5\u6216\u7591\u95ee\u53e5\u4e2d,\u6307\u67d0\u79cd\u53ef\u80fd\u6027\u3002\u4f8b\u5982: Han Mei can't be in the classroom.\u97e9\u6885\u4e0d\u53ef\u80fd\u5728\u6559\u5ba4\u91cc\u3002
\u8868\u793a"\u53ef\u4ee5"\uff0c\u5e38\u7528\u4e8e\u53e3\u8bed\u4e2d\uff0c\u6307\u8bb8\u53ef\u6216\u8bf7\u6c42\u505a\u67d0\u4e8b\u3002\u4f8b\u5982: Can I have a cup of tea, please?\u8bf7\u95ee\u6211\u53ef\u4ee5\u559d\u4e00\u676f\u8336\u5417\uff1f
\u8868\u793a\u201c\u6000\u7591\u201d\uff0c\u5728\u8868\u8fbe\u6b64\u610f\u601d\u65f6\uff0c\u53ea\u80fd\u7528\u4e8e\u4e00\u822c\u7591\u95ee\u53e5\u4e2d\uff0c\u5e26\u6709\u611f\u60c5\u8272\u5f69\u3002

\u201ccan\u201d\u7684\u56db\u79cd\u7528\u6cd5\uff1a
\u8868\u793a"\u80fd\u3001\u4f1a"\uff0c\u6307\u8111\u529b\u6216\u4f53\u529b\u65b9\u9762\u7684"\u80fd\u529b"\u3002\u4f8b\u5982: I can speak English.\u6211\u4f1a\u8bb2\u82f1\u8bed\u3002
\u8868\u793a"\u53ef\u80fd",\u5e38\u7528\u4e8e\u5426\u5b9a\u53e5\u6216\u7591\u95ee\u53e5\u4e2d,\u6307\u67d0\u79cd\u53ef\u80fd\u6027\u3002\u4f8b\u5982: Han Mei can't be in the classroom.\u97e9\u6885\u4e0d\u53ef\u80fd\u5728\u6559\u5ba4\u91cc\u3002
\u8868\u793a"\u53ef\u4ee5"\uff0c\u5e38\u7528\u4e8e\u53e3\u8bed\u4e2d\uff0c\u6307\u8bb8\u53ef\u6216\u8bf7\u6c42\u505a\u67d0\u4e8b\u3002\u4f8b\u5982: Can I have a cup of tea, please?\u8bf7\u95ee\u6211\u53ef\u4ee5\u559d\u4e00\u676f\u8336\u5417\uff1f
\u8868\u793a\u201c\u6000\u7591\u201d\uff0c\u5728\u8868\u8fbe\u6b64\u610f\u601d\u65f6\uff0c\u53ea\u80fd\u7528\u4e8e\u4e00\u822c\u7591\u95ee\u53e5\u4e2d\uff0c\u5e26\u6709\u611f\u60c5\u8272\u5f69\u3002

一、 基本用法
1. 表示能力(如体力和脑力方面),意为“能;会”等。例如:
Can you speak English? 你会讲英语吗?
Can you play the piano? 你会弹钢琴吗?
2. 表示请求或允许,多用在口语中,意为“可以;能”等。用于疑问句中用来提出要求,用于否定句表示不允许。例如:
Can I help you? 我能帮助你吗?You can’t play basketball. 你不能玩篮球。
Can you...?“请你……好吗?”表示说话人的请求;Can I...?“我可以……吗?”用来征求对方是否允许自己做某事。如在句末加上
please一词就显得更有礼貌了。例如:
Can you help me, please? 请你帮助我好吗?
3. 表示可能。例如:
He can be at home now. 他现在可能在家。
The moon can’t always be full. 月亮不可能常圆。
4. 表示怀疑。在表达此意时,只能用于一般疑问句中,带有感情色彩。例如:
Can it be true? 那会是真的吗?
二、 句式变化如下:
1. 在变否定句时,直接在can后加上“not”,可缩写成can’t或cannot, 但不能写成cann’t。例如:
He can swim. → He can’t swim.
Emma can see the pen on the desk.→ Emma cannot see the pen on the desk.
2. 在变一般疑问句时,直接移到主语前(原主语的首字母改成小写,第一人称应变为第二人称)即可。例如:
I can see an orange on the table. → Can you see an orange on the table?
其回答可用Yes, OK或Certainly等作肯定回答;用No或Sorry等作否定回答。例如:
—Can you look after my books, please? 你能照看一下我的书吗?
—OK. 可以。
用Certainly回答。此时语气更为肯定。例如:
—Can I see your guitar? 我能看看你的吉它吗?
—Certainly. 当然可以。

Can

1) 表示能力(体力、知识、技能)。
Can you lift this heavy box?(体力)
Mary can speak three languages.(知识)
Can you skate?(技能)
此时可用be able to代替。Can只有一般现在时和一般过去式;而be able to则有更多的时态。
I’ll not be able to come this afternoon.
当表示“经过努力才得以做成功某事”时应用be able to,不能用Can。如:
He was able to go to the party yesterday evening in spite of the heavy rain.
2) 表示请求和允许。
-----Can I go now?
----- Yes, you can. / No, you can’t.
此时可与may互换。在疑问句中还可用could,
might代替,不是过去式,只是语气更委婉,不能用于肯定句和答语中。
---- Could I come to see you tomorrow?
---- Yes, you can. ( No, I’m afraid not. )
3) 表示客观可能性(客观原因形成的能力)。
They’ve changed the timetable, so we can go by bus instead.
This hall can hold 500 people at least.
4) 表示推测(惊讶、怀疑、不相信的态度),用于疑问句、否定句和感叹句中。
Can this be true?
This can’t be done by him.
How can this be true?



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  • 扩展阅读:can的用法6种 ... can的所有用法 ... can的四种用法 ... can表示能力的用法 ... can的用法初一 ... can表示请求的用法 ... can和is的用法 ... can的用法总结归纳 ... can be表示推测时的用法 ...

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