drop in on sb和 drop in at sp中的in、on、at的词性是什么 drop in on 与drop in at有何区别

drop in on sb\u548c drop in at sp\u4e2d\u7684in\u3001on\u3001at\u7684\u8bcd\u6027\u662f\u4ec0\u4e48

in\u662f\u526f\u8bcd\uff0con\u548cat\u662f\u4ecb\u8bcd\u3002

drop in on\u4e0edrop in at\u7684\u533a\u522b\u4e3a\uff1a\u542b\u4e49\u4e0d\u540c\u3001\u7528\u6cd5\u4e0d\u540c\u3001\u4fa7\u91cd\u70b9\u4e0d\u540c\u3002
\u4e00\u3001\u542b\u4e49\u4e0d\u540c
1.drop in on
\u91ca\u4e49\uff1a \u62dc\u8bbf\u67d0\u4eba\u3002
2.drop in at
\u91ca\u4e49\uff1a\u62dc\u8bbf\u67d0\u5730\u3002
\u4e8c\u3001\u7528\u6cd5\u4e0d\u540c
1.drop in on
\u7528\u6cd5\uff1adrop in on\u591a\u6307\u5728\u8ba1\u5212\u4e4b\u5916\u6216\u4e8b\u5148\u672a\u6253\u62db\u547c\u7684\u5076\u7136\uff0con\u8868\u5730\u70b9\u65f6\uff0c\u6307\u67d0\u7269\u4e0e\u53e6\u4e00\u7269\u8868\u9762\u76f8\u63a5\u89e6\uff0c\u6216\u4e0e\u67d0\u5730\u65b9\u63a5\u58e4\u7b49\u3002
2.drop in at
\u7528\u6cd5\uff1adrop in at\u987a\u4fbf\u8bbf\u95ee\uff0c\u4e5f\u53ef\u6307\u53c2\u89c2\uff0cat\u8868\u5730\u70b9\u65f6\uff0c\u6307\u7a7a\u95f4\u4f4d\u7f6e\u4e0a\u7684\u67d0\u4e00\u70b9\u3002

\u4e09\u3001\u4fa7\u91cd\u70b9\u4e0d\u540c
1.drop in on
\u89e3\u6790\uff1adrop in on\u540e\u9762\u63a5\u8868\u793a\u4eba\u7684\u540d\u8bcd\u6216\u4ee3\u8bcd\u3002
\u4f8b\u53e5\uff1aIt's improper to drop in on him so casually.\u8fd9\u6837\u5192\u5192\u5931\u5931\u53bb\u627e\u4ed6\u53ef\u4e0d\u597d\u3002
2.drop in at
\u89e3\u6790\uff1adrop in at\u540e\u9762\u63a5\u8868\u793a\u5904\u6240\u7684\u540d\u8bcd\u6216\u4ee3\u8bcd\u3002
\u4f8b\u53e5\uff1aPlease drop in at my office when you happen to be free.\u5982\u679c\u4f60\u78b0\u5de7\u6709\u7a7a\u7684\u8bdd\uff0c\u8bf7\u5230\u6211\u7684\u529e\u516c\u5ba4\u6765\u3002

用“词组构法”的角度来想的话会更简单，一般地，像drop in，pick up等这样的短语的结构为“动副结构”（注意：“动副”型短语用作vt后接宾语时，如果宾语为n，adv位于n前后皆可；如果宾语为人称pron，则该pron必须位于v和adv之间）。Drop in at+地点 拜访某地 drop in on+人 拜访某人而在动副短语之后的词一般是介词，你如果不懂，可以想想初一的“look forward to”Look （v） forward (adv) to(prep) 就是因为to是介词，这不才加V-ing形式吗？

你好！in是副词，on和at是介词。

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