while 前后时态问题。主句一般过去时，什么时候从句一般过去时，什么时候过去进行时？ when引导的时间状语从句,主句用一般过去时,从句用过去进行...
while\u5f15\u5bfc\u7684\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5\uff0c\u4ece\u53e5\u662f\u8fdb\u884c\u65f6\uff0c\u4e3b\u53e5\u7684\u65f6\u6001\u4ec0\u4e48\u65f6\u5019\u7528\u8fc7\u53bb\u8fdb\u884c\u65f6\uff0c\u4ec0\u4e48\u65f6\u5019\u7528\u4e00\u822c\u8fc7\u53bb\u65f6\uff1fwhile
1. \u901a\u5e38\u7528\u5728\u4e8b\u60c5\u540c\u65f6\u53d1\u751f\u7684\u60c5\u51b5\uff0c\u4e3b\u53e5\u548c\u4ece\u53e5\u90fd\u7528\u8fc7\u53bb\u8fdb\u884c\u65f6
eg:Mother was cooking the meal while i was doing my homework.
\u5f53\u5988\u5988\u5728\u505a\u996d\u7684\u65f6\u5019\uff0c\u6211\u6b63\u5728\u505a\u529f\u8bfe
2. \u8868\u793a\u540c\u65f6\uff0c\u800c...\u7684\u610f\u5473\u65f6\uff0c\u4e3b\u53e5\u548c\u4ece\u53e5\u7684\u65f6\u6001\u662f\u4e00\u81f4\u7684\uff0c\u5373\u53ef\u4ee5\u90fd\u662f\u4e00\u822c\u73b0\u5728\u65f6\uff0c\u53c8\u53ef\u4ee5\u90fd\u662f\u4e00\u822c\u8fc7\u53bb\u65f6\uff0c\u5982\uff1a
I like playing football while Jim likes playing basketball.
\u6211\u559c\u6b22\u8e22\u8db3\u7403\uff0c\u7136\u800cJim\u559c\u6b22\u6253\u7bee\u7403\u3002
Yesterday my parents went to the cinema while I stayed at home.
\u6628\u5929\u7238\u7238\uff0c\u5988\u5988\u53bb\u770b\u7535\u5f71\u4e86\uff0c\u800c\u6211\u5446\u5728\u5bb6\u91cc\u5728\u3002
\u8fd9\u91cc\u6709\u4e09\u70b9\u4f60\u8981\u660e\u767d\uff1a
\u3010when+\u8fc7\u53bb\u8fdb\u884c\u65f6\uff0c\u4e3b\u53e5\u4e00\u822c\u8fc7\u53bb\u65f6\u3011\u8fd9\u4e2a\u53e5\u578b\u5e76\u4e0d\u662f\u56fa\u5b9a\u53e5\u578b\uff0c\u4e5f\u5c31\u662f\u8bf4\u6ca1\u6709\u89c4\u5b9a\u5fc5\u987b\u8fd9\u4e48\u7528\uff0c\u5b8c\u5168\u8981\u770b\u53e5\u610f\u8868\u8fbe\uff1b
\u3010be\u52a8\u8bcd+\u79fb\u4f4d\u6027\u52a8\u8bcd\u3011\u8868\u793a\u5c06\u6765\u53d1\u751f\uff0c\u79fb\u4f4d\u6027\u52a8\u8bcd\u5305\u62ec\u79bb\u5f00\uff08leave\uff09\u3001\u5230\u8fbe\uff08arrive\uff09\u3001\u8d70\uff08go\uff09\u7b49\u7b49\u8fd9\u6837\u8868\u79fb\u52a8\u6027\u52a8\u4f5c\u7684\u52a8\u8bcd\u3002
\u7ed3\u54081\u548c2\uff0c\u4f60\u8981\u641e\u6e05\u695a\u8fc7\u53bb\u8fdb\u884c\u65f6\u548cbe\u52a8\u8bcd+\u79fb\u4f4d\u6027\u52a8\u8bcd\u8fd9\u4e24\u79cd\u5f62\u5f0f\u7684\u533a\u522b\u3002\u8fc7\u53bb\u8fdb\u884c\u65f6\u63cf\u8ff0\u8fc7\u53bb\u6b63\u5728\u53d1\u751f\u7684\u52a8\u4f5c\uff0c\u800cbe+\u79fb\u4f4d\u6027\u52a8\u8bcd\u8868\u793a\u5c06\u6765\u53d1\u751f\uff0c\u8fd9\u4e0d\u80fd\u6df7\u4e3a\u4e00\u8c08\u3002
\u4e0b\u9762\u89e3\u7b54\u4f60\u7684\u4f8b\u53e5\uff1a
\u2460When I was leaving the house, my mother came back. \u8fd9\u91cc\u7684when i was leaving the house\uff0c\u610f\u601d\u662f\u201c\u6211\u521a\u8981\u79bb\u5f00\u5bb6\u201d\uff0c\u610f\u4e3a\u8fd8\u6ca1\u79bb\u5f00\uff0c\u9a6c\u4e0a\u5c06\u8981\u53d1\u751f\u7684\u4e8b\u60c5\uff0c\u540e\u9762\u7684\u201c\u6211\u5988\u5988\u56de\u6765\u4e86\u201d\uff0c\u662f\u4e00\u4e2a\u53d1\u751f\u5728\u8fc7\u53bb\u7684\u77ac\u65f6\u52a8\u4f5c\uff0c\u6ca1\u6709\u6301\u7eed\u6027\uff0c\u6240\u4ee5\u7528\u4e00\u822c\u8fc7\u53bb\u65f6\u3002\u3010\u8981\u6ce8\u610f\u77ac\u65f6\u52a8\u8bcd\u4e0d\u80fd\u7528be+doing\u7684\u5f62\u5f0f\uff08\u6ca1\u6709\u201c\u6b63\u5728\u505a\u201d\u7684\u610f\u601d\uff09\uff0c\u9664\u975e\u662f2\u7684\u60c5\u51b5\u3011\u8fd9\u91cc\u4ece\u53e5\u662fBe+\u79fb\u4f4d\u6027\u52a8\u8bcd\uff0c\u4e3b\u53e5\u662f\u4e00\u822c\u73b0\u5728\u65f6\u3002
\u2461When she was cleaning the room,her husband arrived home. \u8fd9\u91cc\u4ece\u53e5\u4e2d\u7684cleaning\u662f\u4e00\u4e2a\u6301\u7eed\u6027\u52a8\u4f5c\uff0c\u8bf4\u660e\u90a3\u662f\u5979\u201c\u6b63\u5728\u201d\u6253\u626b\u623f\u95f4\uff0c\u4e0e\u79fb\u4f4d\u548c\u77ac\u65f6\u65e0\u5173\uff0c\u540e\u9762\u7684arrived\u540c\u2460\u7684\u4e3b\u53e5\uff0c\u662f\u4e00\u4e2a\u77ac\u65f6\u52a8\u4f5c\uff0c\u6ca1\u6709\u6301\u7eed\u6027\uff0c\u7528\u4e00\u822c\u8fc7\u53bb\u65f6\u3002\u8fd9\u91cc\u4ece\u53e5\u662f\u8fc7\u53bb\u8fdb\u884c\u65f6\uff0c\u4e3b\u53e5\u662f\u4e00\u822c\u73b0\u5728\u65f6\u3002
\u2462When the teacher came into the classroom, all the students were talking loudly. \u8fd9\u4e2a\u662f1\u7684\u60c5\u51b5\uff0c\u8981\u770b\u53e5\u610f\u8868\u8fbe\uff0c\u6ca1\u4ec0\u4e48\u662f\u4e00\u6210\u4e0d\u53d8\u7684\u3002\u8fd9\u91cc\u4ece\u53e5\u4e2d\u8001\u5e08\u201c\u8fdb\u6765\u201d\u662f\u4e00\u4e2a\u77ac\u65f6\u52a8\u4f5c\uff0c\u6240\u4ee5\u7528\u4e00\u822c\u8fc7\u53bb\u65f6\uff0c\u800c\u4e3b\u53e5\u4e2d\u540c\u5b66\u4eec\u201c\u6b63\u5728\u201d\u5927\u58f0\u8bf4\u8bdd\u3002\u4f60\u53ef\u4ee5\u60f3\u8c61\u4e00\u4e0b\u90a3\u4e2a\u753b\u9762\uff0c\u7528\u4e2d\u6587\u6765\u8868\u8fbe\u7684\u8bdd\u90fd\u662f\u201c\u8001\u5e08\u8fdb\u6765\u7684\u65f6\u5019\uff0c\u5b66\u751f\u4eec\u6b63\u5927\u58f0\u8bf4\u8bdd\u201d\uff0c\u53ef\u89c1\u8fd9\u91cc\u4ece\u53e5\u662f\u4e00\u822c\u8fc7\u53bb\u65f6\uff0c\u800c\u4e3b\u53e5\u662f\u8fc7\u53bb\u8fdb\u884c\u65f6\u3002
\u2463When the postman arrived at my home, we were having lunch.\u8fd9\u53e5\u60c5\u51b5\u548c\u2462\u4e00\u6837\uff0c\u4ece\u53e5\u4e00\u822c\u8fc7\u53bb\u65f6\uff0c\u4e3b\u53e5\u8fc7\u53bb\u8fdb\u884c\u65f6\u3002
\u2464.What were you doing when I called you last night? \u540c\u7406\uff0c\u4ece\u53e5\u4e00\u822c\u8fc7\u53bb\u65f6\uff0c\u4e3b\u53e5\u8fc7\u53bb\u8fdb\u884c\u65f6\u3002
\u6682\u65f6\u5c31\u8fd9\u6837\uff0c\u8bed\u6cd5\u90e8\u5206\u8fd8\u9700\u8981\u518d\u591a\u8865\u4e60\u54e6\uff0c\u4e0d\u80fd\u5149\u80cc\u53e5\u578b\uff0c\u53e5\u578b\u4e0d\u662f\u4e0d\u53d8\u7684\u66f4\u4e0d\u662f\u4e07\u80fd\u7684\uff01\u4e0d\u4f1a\u53ef\u4ee5\u95ee\u6211\uff01
eg.
While the discussion was still going on,George came in.
当讨论还在进行时,乔治走了进来.
Strike while the iron is hot.
趁热打铁.
（2）while强调同时性或某时间段内一种情况发生时另一种情况出现,与延续性动词连用;when可与延续或非延续性动词连用.
eg.———I’m going to the post office.
———______you’re there,can you get me some stamps?
A.As B.While
C.Because D.If
解析:从该题的题意可以看出C、D两选项不合题意；而as侧重同时性,不合题意;while可指一时间段发生某情况时,另一情况出现,正合题意.
扩展阅读：while 1 为什么只循环一次 ... while引导的三种时态 ... while前后对应的时态 ... as when while三者区别 ... while 0 循环还执行吗 ... while 1 是无限循环吗 ... while的前后时态用法 ... while前后都用进行时吗 ... while引导的句子前后时态 ...
