knock on和knock at都当敲门讲时有区别吗？ Knock on 和Knock at 有什么区别

knock on\u548cknock at\u90fd\u5f53\u6572\u95e8\u8bb2\u65f6\u6709\u533a\u522b\u5417

Knock on: \u6572\uff08\u95e8\u3001\u7a97\u7b49\uff09
\u4f8b\u53e5\u4e0e\u7528\u6cd5:
1. He accidentally knocked on (the pass from Jones).
\u4ed6\u975e\u6545\u610f\u72af\u89c4, \u7528\u624b\u5411\u524d\u51fb\u4e86\uff08\u4ece\u743c\u65af\u4f20\u6765\u7684\uff09\u7403.
2. Jim sat up when he heard the knock on his bedroom door.
\u5409\u59c6\u542c\u5230\u6572\u5bdd\u5ba4\u95e8\u7684\u58f0\u97f3\u65f6\u4fbf\u5750\u4e86\u8d77\u6765\u3002
3. Please do not enter before knocking on the door.
\u8fdb\u6765\u524d\u8bf7\u5148\u6572\u95e8\u3002

Knock at: vt. \u6572
\u4f8b\u53e5\u4e0e\u7528\u6cd5:
1. There was a furious knock at the door.
\u6709\u4eba\u5728\u731b\u70c8\u5730\u6572\u95e8\u3002
2. Did I hear a knock at the door?
\u662f\u6709\u4eba\u6572\u95e8\u5417?
3. Did you hear the knocks at the door?
\u4f60\u542c\u5230\u6572\u95e8\u58f0\u4e86\u5417\uff1f

\u6ca1\u4ec0\u4e48\u5927\u533a\u522b\u3002

Knock on \u548cKnock at \u533a\u522b\uff1a
\u4e00\u3001\u542b\u4e49\u4e0d\u540c
1\u3001Knock on
\u91ca\u4e49\uff1a\u6572\u51fb\uff0c\u7ed3\u675f\u3002
\u4f8b\u53e5\uff1aPlease do not enter before knocking on the door.
\u8fdb\u6765\u524d\u8bf7\u5148\u6572\u95e8\u3002

2\u3001Knock on
\u91ca\u4e49\uff1a\u6572\uff0c\u649e
\u4f8b\u53e5\uff1aDid you hear the knocks at the door?
\u4f60\u542c\u5230\u6572\u95e8\u58f0\u4e86\u5417?
\u4e8c\u3001\u7528\u6cd5\u4e0d\u540c
1\u3001Knock on
\u7528\u6cd5\uff1a\u540e\u9762\u53ef\u4ee5\u8ddf\u5176\u4ed6\u7269\u54c1\u3002
2\u3001knock at
\u7528\u6cd5\uff1a\u53ea\u7528\u4e8e\u8868\u793a\u6572\u95e8\u3002
\u4e09\u3001knock at\u672c\u8eab\u5c31\u662f\u4e2a\u56fa\u5b9a\u7684\u8bcd\u7ec4\u5f62\u5f0f,\u5728\u8868\u793a\u4e3a\u6572\u95e8\u6216\u8005\u5176\u5b83\u90fd\u53ef\u4ee5\u7528\u3002
\u800cknock\u3000on\u5e76\u4e0d\u662f\u8bcd\u7ec4\u5f62\u5f0f,on\u53ea\u662f\u4fee\u9970\u540e\u9762\u8ddf\u7684\u540d\u8bcd\u7684\u4ecb\u8bcd\u7f62\u4e86\u3002
\u6269\u5c55\u8d44\u6599\uff1a
Knock\u91ca\u4e49\uff1a
\u4e00\u3001\u4e0d\u53ca\u7269\u52a8\u8bcd vi.
1.\u76f8\u649e,\u78b0\u51fb
\u4f8b\u53e5\uff1aHis legs knocked against the chair.
\u4ed6\u7684\u4e24\u6761\u817f\u649e\u5230\u4e86\u6905\u5b50\u3002
2.\u6572,\u51fb,\u6253
\u4f8b\u53e5\uff1aHe knocked at the door and entered.
\u4ed6\u6572\u4e86\u6572\u95e8\u4fbf\u8d70\u8fdb\u53bb\u4e86\u3002
\u4e8c\u3001\u53ca\u7269\u52a8\u8bcdvt.
1\u3001\u6572,\u51fb,\u6253
The falling bottle knocked him on the head.
\u8dcc\u843d\u7684\u74f6\u5b50\u7838\u5728\u4ed6\u7684\u5934\u4e0a\u3002
2\u3001\u51fb(\u649e)\u6210...
The blow knocked her senseless.
\u90a3\u4e00\u51fb\u628a\u5979\u6253\u660f\u4e86\u3002
\u4e09\u3001\u540d\u8bcd n.
1\u3001\u6572;\u51fb,\u6253
When I fell I got a terrible knock on the head.
\u6211\u6454\u5012\u65f6\u5934\u649e\u5f97\u5f88\u5389\u5bb3\u3002
2\u3001\u4e0d\u5e78;\u632b\u6298;\u8270\u82e6
We have to take certain knocks in life.
\u6211\u4eec\u5728\u4e00\u751f\u4e2d\u603b\u5f97\u906d\u53d7\u67d0\u4e9b\u632b\u6298\u3002

1、knock at the door 和knock on the door 都是敲门的意思，二者区别不大。

2、at强调一个点,on强调面。at 常和knock 名词形式连用；on常和knock 动词形式连用，如果knock用作名词时，用a。