while 和whilst的区别 whilst和while用法意思基本完全相同，为什么现在很少...

\u4ec0\u4e48\u65f6\u5019\u7528when\u4ec0\u4e48\u65f6\u5019\u7528while?

When\u548cWhile\u7684\u533a\u522b
1\u3001when\u662fat or during the time that,\u65e2\u6307\u65f6\u95f4\u70b9,\u4e5f\u53ef\u6307\u4e00\u6bb5\u65f6\u95f4,while\u662fduring the time that,\u53ea\u6307\u4e00\u6bb5\u65f6\u95f4,\u56e0\u6b64when\u5f15\u5bfc\u7684\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5\u4e2d\u7684\u52a8\u8bcd\u53ef\u4ee5\u662f\u7ec8\u6b62\u6027\u52a8\u8bcd,\u4e5f\u53ef\u4ee5\u662f\u5ef6\u7eed\u6027\u52a8\u8bcd,\u800cwhile\u4ece\u53e5\u4e2d\u7684\u52a8\u8bcd\u5fc5\u987b\u662f\u5ef6\u7eed\u6027\u52a8\u8bcd.
2\u3001when \u8bf4\u660e\u4ece\u53e5\u7684\u52a8\u4f5c\u548c\u4e3b\u53e5\u7684\u52a8\u4f5c\u53ef\u4ee5\u662f\u540c\u65f6,\u4e5f\u53ef\u4ee5\u662f\u5148\u540e\u53d1\u751f\uff1bwhile \u5219\u5f3a\u8c03\u4e3b\u53e5\u7684\u52a8\u4f5c\u5728\u4ece\u53e5\u52a8\u4f5c\u7684\u53d1\u751f\u7684\u8fc7\u7a0b\u4e2d\u6216\u4e3b\u4ece\u53e5\u4e24\u4e2a\u52a8\u4f5c\u540c\u65f6\u53d1\u751f.
3\u3001\u7531when\u5f15\u5bfc\u7684\u65f6\u95f4\u72b6\u8bed\u4ece\u53e5,\u4e3b\u53e5\u7528\u8fc7\u53bb\u8fdb\u884c\u65f6,\u4ece\u53e5\u5e94\u7528\u4e00\u822c\u8fc7\u53bb\u65f6\uff1b\u5982\u679c\u4ece\u53e5\u548c\u4e3b\u53e5\u7684\u52a8\u4f5c\u540c\u65f6\u53d1\u751f,\u4e24\u53e5\u90fd\u7528\u8fc7\u53bb\u8fdb\u884c\u65f6\u7684\u65f6\u5019,\u591a\u7528while\u5f15\u5bfc,\u5982\uff1a
a.When the teacher came in,we were talking.\u5f53\u6b64\u53e5\u6539\u53d8\u4e3b\u4ece\u53e5\u7684\u4f4d\u7f6e\u65f6,\u5219\u4e3a\uff1aWhile we were talking,the teacher came in.
b.They were singing while we were dancing.

4\u3001when\u548cwhile \u8fd8\u53ef\u4f5c\u5e76\u5217\u8fde\u8bcd.when\u8868\u793a\u201c\u5728\u90a3\u65f6\u201d\uff1bwhile\u8868\u793a\u201c\u800c,\u5374\u201d,\u8868\u5bf9\u7167\u5173\u7cfb.\u5982\uff1a
a.The children were running to move the bag of rice when they heard the sound of a motor bike.\u5b69\u5b50\u4eec\u6b63\u8981\u8dd1\u8fc7\u53bb\u642c\u5f00\u90a3\u888b\u7c73,\u8fd9\u65f6\u4ed6\u4eec\u542c\u5230\u4e86\u6469\u6258\u8f66\u7684\u58f0\u97f3.
b.He is strong while his brother is weak.\u4ed6\u957f\u5f97\u5f88\u7ed3\u5b9e,\u800c\u4ed6\u5f1f\u5f1f\u5374\u5f88\u7626\u5f31.

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简单的答案是：
两者都是正确英语，没有区别，可以互换。"while" 在美国最常用，而 "whilst" 一般被视为过期。
另外"whilst" 常用于英国学术界。

二者意思一样用法一样，前者常用后者不常用，用while的地方都可换做whilst，所以例句就很多啦。