下面这两句话中的介词“in”都是表“原因”吗？替换为“for”后是否有语法错误？ 下面这句话中“for”替换为介词“to”后有语法错误吗？为什...
\u4e0b\u9762\u8fd9\u53e5\u8bdd\u4e2d\u201cin search of\u201d\u66ff\u6362\u4e3a to search of \u6216 to search for \u6216 in search for \u6709\u8bed\u6cd5\u9519\u8bef\u5417\uff1fin search of \u56fa\u5b9a\u642d\u914d\uff0c\u80af\u5b9a\u6ca1\u9519\u3002
to search for \u4e0d\u5b9a\u5f0f\u77ed\u8bed\uff0c\u8bed\u6cd5\u4e0a\u4e5f\u6ca1\u95ee\u9898\uff0c\u7528\u5206\u8bcd\u77ed\u8bed searching for \u4e5f\u53ef\u4ee5\u3002
to search of \u548c in search for \u4e0d\u5bf9\u3002search \u65e2\u53ef\u4ee5\u662f\u52a8\u8bcd\uff0c\u4e5f\u53ef\u4ee5\u662f\u540d\u8bcd\u3002\u5f53\u5b83\u662f\u52a8\u8bcd\u7684\u65f6\u5019\u53ef\u4ee5\u540e\u63a5 for\uff0c\u8868\u793a\u641c\u5bfb\uff0c\u4f46\u524d\u9762\u4e0d\u53ef\u80fd\u662f\u4e2a\u4ecb\u8bcd in \uff08\u4ecb\u8bcd\u540e\u9762\u53ea\u80fd\u8ddf\u540d\u8bcd\u6027\u6210\u5206\uff09\uff1b\u5f53\u5b83\u662f\u540d\u8bcd\u7684\u65f6\u5019\u524d\u9762\u53ef\u4ee5\u662f in\uff0c\u4f46\u9664\u975e\u662f\u56fa\u5b9a\u642d\u914d\uff0c\u5426\u5219\u81f3\u5c11\u5728\u540d\u8bcd search \u524d\u9700\u8981\u6709\u51a0\u8bcd\u624d\u7b26\u5408\u8bed\u6cd5\uff0c\u5982 in the search\uff0c in a search... \u8fd9\u65f6\u540e\u8fb9\u5199 for \u5dee\u4e0d\u591a\u4e5f\u6210\u7acb\uff0c\u4f46\u662f\u660e\u660e\u6709\u7b80\u6d01\u7684\u56fa\u5b9a\u642d\u914d\uff0c\u4e00\u822c\u4eba\u4e0d\u4f1a\u9009\u62e9\u8fd9\u6837\u5199\u7684\u3002
\u6709\u8bed\u6cd5\u9519\u8bef\uff0c
\u56e0\u4e3aboredom\u662f\u540d\u8bcd\uff0c
\u5982\u679c\u6539\u6210to\u540e\u9762\u9700\u8981\u8ddf\u52a8\u8bcd\u3002
1. 首先，这两个介词in并不是表原因的。
sth. be forgotten in…的意思是“对某事的记忆被淹没在…中”，可视为固定搭配，且介词只能用in. 句子Both were forgotten in her sudden discovery that her front door was open.直译为“对二者的记忆被淹没在她的前门敞开着这一猛然发现之中”，也就是“在她猛然发现自己的前门敞开着时，她对两件事忘得一干二净”。
第二个in的用法相信题主是清楚的：在ask/need help in sth./doing sth.及help sb. in sth./doing sth.这类表述中，介词只能用in而不能用其它的。
2. 既然在上述两个场合都只能用介词in，自然就不能被别的介词替换，替换为for后当然就有语法错误喽。
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