被看见正在做某事是to be doing 还是doing？ 不定式的进行式to be doing有什么用法
\u975e\u8c13\u8bed\u52a8\u8bcdto be doing \u548cdoing\u7684\u533a\u522bto be doing:\u5c06\u8981\u8fdb\u884c\u67d0\u4e8b
doing\uff1a\u6b63\u5728\u8fdb\u884c\u67d0\u4e8b
\u5982\u679c\u662fpretend to be doing\u5c31\u662f\u5047\u88c5\u5c06\u8981\u8fdb\u884c\u67d0\u4e8b\u3002
\u5b66\u4e60\uff0c\u662f\u6307\u901a\u8fc7\u9605\u8bfb\u3001\u542c\u8bb2\u3001\u601d\u8003\u3001\u7814\u7a76\u3001\u5b9e\u8df5\u7b49\u9014\u5f84\u83b7\u5f97\u77e5\u8bc6\u548c\u6280\u80fd\u7684\u8fc7\u7a0b\u3002\u5b66\u4e60\u5206\u4e3a\u72ed\u4e49\u4e0e\u5e7f\u4e49\u4e24\u79cd:
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\u4e0d\u5b9a\u5f0f\u7684\u8fdb\u884c\u5f0fto be doing\u7528\u6cd5
\u4e00\u3001\u8868\u793a\u540c\u65f6
\u8868\u793a\u4e0e\u8c13\u8bed\u52a8\u4f5c\u540c\u65f6\u53d1\u751f\u4e14\u6b63\u5728\u8fdb\u884c\u7684\u52a8\u4f5c\u3002\u5982\uff1a
He seems to be saying something. \u4ed6\u4f3c\u4e4e\u5728\u8bf4\u4ec0\u4e48\u3002
He is thought to be hiding in the woods. \u4eba\u4eec\u8ba4\u4e3a\u4ed6\u8eb2\u5728\u6797\u5b50\u91cc\u3002
It\u2019s nice to be sitting here with you. \u548c\u4f60\u4e00\u8d77\u5750\u5728\u8fd9\u513f\u771f\u597d\u3002
Why\u2019s she so late?\u2014She can\u2019t still be working. \u5979\u600e\u4e48\u8fd9\u4e48\u665a\u8fd8\u4e0d\u6765?\u2014\u2014\u5979\u4e0d\u53ef\u80fd\u8fd8\u5728\u5de5\u4f5c\u5427\u3002
\u4e8c\u3001\u8868\u793a\u5c06\u6765
\u6b63\u5982\u53ef\u7528\u8fdb\u884c\u65f6\u6001\u8868\u793a\u5c06\u6765\u610f\u4e49\u4e00\u6837\uff0c\u4e0d\u5b9a\u5f0f\u7684\u8fdb\u884c\u5f0f\u6709\u65f6\u4e5f\u53ef\u8868\u793a\u5c06\u6765\u3002\u5982\uff1a
He was happy to be coming home. \u5c31\u8981\u56de\u5bb6\u4e86\u4ed6\u611f\u5230\u9ad8\u5174\u3002
The old man seems to be dying. \u8fd9\u8001\u4eba\u4f3c\u4e4e\u8981\u6b7b\u4e86\u3002
see somebody do是看见某人干干某事
is seen doing sth是被看见某人正在干某事
is seen do sth是被看见某人干某事
这种情况下一般都是过去进行时
Ex：我看见他正在喝水
I saw he was drinking water.
如果说是我正在看见他正在喝水
那就是V原+ing+Sb+doing+Sth
be seen doing sth是某人被看见正在干某事
be seen do sth是某人被看见干某事了
see sb doing sth
be seen doing
He is seen dancing他被看见跳舞
扩展阅读：cant help doing ... best to do ... waste time doing sth ... try to do和try doing ... do nothing but to do ... go to swim正确吗 ... a guide to doing ... can t help but do ... 看见某人做了某事 ...
