when 和 while的区别、用法 while和when的用法区别
when\u548cwhile\u7684\u7528\u6cd5\u548c\u533a\u522b"when"\u548c"while"\u90fd\u662f\u82f1\u8bed\u4e2d\u7684\u4ece\u5c5e\u8fde\u8bcd\uff0c\u5728\u53e5\u5b50\u4e2d\u8fde\u63a5\u4e00\u4e2a\u4ece\u53e5\u548c\u4e00\u4e2a\u4e3b\u53e5\uff0c\u8d77\u5230\u65f6\u95f4\u5173\u7cfb\u7684\u4f5c\u7528\uff0c\u4f46\u5728\u4f7f\u7528\u65f6\u6709\u4e00\u4e9b\u4e0d\u540c\uff1a"when"\u8868\u793a\u4e24\u4e2a\u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u95f4\u662f\u76f8\u4e92\u5173\u8054\u7684\uff0c\u4e00\u4e2a\u4e8b\u4ef6\u53d1\u751f\u540e\u53e6\u4e00\u4e2a\u4e8b\u4ef6\u7acb\u5373\u53d1\u751f\u3002\u4f8b\u5982\uff1aWhen I arrived at the airport, the plane had already taken off. \uff08\u5f53\u6211\u5230\u8fbe\u673a\u573a\u65f6\uff0c\u98de\u673a\u5df2\u7ecf\u8d77\u98de\u4e86\u3002\uff09I always drink coffee when I wake up. \uff08\u6211\u6bcf\u5929\u4e00\u8d77\u5e8a\u5c31\u559d\u5496\u5561\u3002\uff09"while"\u8868\u793a\u4e24\u4e2a\u4e8b\u4ef6\u53d1\u751f\u7684\u65f6\u95f4\u662f\u540c\u65f6\u8fdb\u884c\u7684\uff0c\u5b83\u4eec\u53ef\u80fd\u4f1a\u91cd\u53e0\u6216\u8005\u5728\u540c\u4e00\u65f6\u95f4\u6bb5\u5185\u53d1\u751f\u3002\u4f8b\u5982\uff1aWhile I was watching TV, my phone rang. \uff08\u5f53\u6211\u5728\u770b\u7535\u89c6\u65f6\uff0c\u624b\u673a\u54cd\u4e86\u3002\uff09I listened to music while I was cleaning the house. \uff08\u6211\u5728\u6253\u626b\u623f\u5b50\u7684\u65f6\u5019\u542c\u97f3\u4e50\u3002\uff09\u603b\u4e4b\uff0c"when"\u548c"while"\u90fd\u7528\u6765\u63cf\u8ff0\u65f6\u95f4\u5173\u7cfb\uff0c\u4f46\u662f"when"\u901a\u5e38\u7528\u4e8e\u63cf\u8ff0\u4e24\u4e2a\u4e8b\u4ef6\u4e4b\u95f4\u7684\u5148\u540e\u5173\u7cfb\uff0c\u800c"while"\u5219\u901a\u5e38\u7528\u4e8e\u63cf\u8ff0\u4e24\u4e2a\u4e8b\u4ef6\u4e4b\u95f4\u7684\u540c\u65f6\u6027\u3002
when, while\u8fd9\u4e09\u4e2a\u8bcd\u90fd\u6709"\u5f53\u2026\u2026\u65f6\u5019"\u4e4b\u610f\uff0c\u4f46\u7528\u6cd5\u6709\u6240\u4e0d\u540c\uff0c\u4f7f\u7528\u65f6\u8981\u7279\u522b\u6ce8\u610f\u3002
\u2460when\u610f\u4e3a"\u5728\u2026\u2026\u65f6\u523b\u6216\u65f6\u671f"\uff0c\u5b83\u53ef\u517c\u6307"\u65f6\u95f4\u70b9"\u4e0e"\u65f6\u95f4\u6bb5"\uff0c\u6240\u5f15\u5bfc\u7684\u4ece\u53e5\u7684\u52a8\u8bcd\u65e2\u53ef\u4ee5\u662f\u7ec8\u6b62\u6027\u52a8\u8bcd\uff0c\u4e5f\u53ef\u662f\u6301\u7eed\u6027\u52a8\u8bcd\u3002\u5982\uff1a
When I got home, he was having supper.\u6211\u5230\u5bb6\u65f6\uff0c\u4ed6\u6b63\u5728\u5403\u996d\u3002
When I was young, I liked dancing.\u6211\u5e74\u8f7b\u65f6\u559c\u6b22\u8df3\u821e\u3002
\u2461while\u53ea\u6307"\u65f6\u95f4\u6bb5"\uff0c\u4e0d\u6307"\u65f6\u95f4\u70b9"\uff0c\u4ece\u53e5\u7684\u52a8\u8bcd\u53ea\u9650\u4e8e\u6301\u7eed\u6027\u52a8\u8bcd\u3002\u5982\uff1a
While I slept, a thief broke in.\u5728\u6211\u7761\u89c9\u65f6,\u76d7\u8d3c\u95ef\u4e86\u8fdb\u6765\u3002
\u8fa8\u6790
\u2460when\u4ece\u53e5\u4e0e\u4e3b\u53e5\u52a8\u4f5c\u5148\u540e\u53d1\u751f\u65f6\uff0c\u4e0d\u80fd\u4e0ewhile\u4e92\u6362\u3002\u5982\uff1a
When he has finished his work, he takes a short rest.\u6bcf\u5f53\u4ed6\u505a\u5b8c\u5de5\u4f5c\u540e\uff0c\u603b\u8981\u7a0d\u7a0d\u4f11\u606f\u4e00\u4e0b\u3002(when = after)
When I got to the cinema, the film had already begun.\u5f53\u6211\u5230\u7535\u5f71\u9662\u65f6\uff0c\u7535\u5f71\u5df2\u7ecf\u5f00\u59cb\u4e86\u3002(when=before)
\u2461when\u4ece\u53e5\u52a8\u8bcd\u4e3a\u7ec8\u6b62\u6027\u52a8\u8bcd\u65f6\uff0c\u4e0d\u80fd\u7531while\u66ff\u6362\u3002\u5982\uff1a
When he came yesterday, we were playing basketball.\u6628\u5929\u4ed6\u6765\u65f6\uff0c\u6211\u4eec\u6b63\u5728\u6253\u7bee\u7403\u3002
\u2462\u5f53\u4ece\u53e5\u7684\u8c13\u8bed\u662f\u8868\u52a8\u4f5c\u7684\u5ef6\u7eed\u6027\u52a8\u8bcd\u65f6\uff0cwhen, while\u624d\u6709\u53ef\u80fd\u4e92\u76f8\u66ff\u4ee3\u3002\u5982\uff1a
While / When we were still laughing, the teacher came in.\u6b63\u5f53\u6211\u4eec\u4ecd\u5728\u5927\u58f0\u5b09\u7b11\u65f6\uff0c\u8001\u5e08\u8fdb\u6765\u4e86\u3002
\u2463\u5f53\u4ece\u53e5\u7684\u8c13\u8bed\u52a8\u8bcd\u662f\u7ec8\u6b62\u6027\u52a8\u8bcd\uff0c\u800c\u4e14\u4e3b\u53e5\u7684\u8c13\u8bed\u52a8\u8bcd\u4e5f\u662f\u7ec8\u6b62\u6027\u52a8\u8bcd\u65f6,when\u53ef\u548cas\u901a\u7528\uff0c\u800c\u4e14\u7528as\u6bd4\u7528when\u5728\u65f6\u95f4\u4e0a\u66f4\u4e3a\u7d27\u51d1\uff0c\u6709"\u6b63\u5f53\u8fd9\u65f6"\u7684\u542b\u4e49\u3002\u5982\uff1a
He came just as (or when) I reached the door.\u6211\u521a\u5230\u95e8\u90a3\u513f\uff0c\u4ed6\u5c31\u6765\u4e86\u3002
\u2464\u4ece\u53e5\u7684\u8c13\u8bed\u52a8\u8bcd\u5982\u8868\u793a\u72b6\u6001\u65f6\uff0c\u901a\u5e38\u7528while\u3002\u5982\uff1a
We must strike while the iron is hot.\u6211\u4eec\u5e94\u8be5\u8d81\u70ed\u6253\u94c1\u3002
\u2465while\u548cwhen\u90fd\u53ef\u4ee5\u7528\u4f5c\u5e76\u5217\u8fde\u8bcd\u3002
Mike is tall while his brother is short.\u8fc8\u514b\u7684\u4e2a\u5b50\u5f88\u9ad8\uff0c\u7136\u800c\u4ed6\u5f1f\u5f1f\u5f88\u77ee\u3002
Mary was on her way home when two big boys stopped her.\u739b\u4e3d\u6b63\u8d70\u5728\u56de\u5bb6\u7684\u8def\u4e0a\uff0c\u8fd9\u65f6\u4e24\u4e2a\u5927\u4e2a\u5b50\u7537\u5b69\u62e6\u4f4f\u5979\u3002
while表示某一阶段（在…期间，是一个时间范围）
当然，while还可以用于表示一定的转折含义，有“虽然，然而”的意思。
as和when、while的区别
when 是什么时候，while是当。。。的时候，汉语你体会一下他们的区别。
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