observe sb to do/doing 区别 see sb.do，see sb.to do和see sb....
observe sb todo\u8fd8\u662f doobserve sb do sth
\u8fd9\u4e2a\u8868\u793a\u89c2\u5bdf\u67d0\u4eba\u505a\u67d0\u4e8b\u7684\u6574\u4e2a\u8fc7\u7a0b\uff0c\u5c31\u662f\u6307\u6709\u610f\u8bc6\u5730\u53bb\u89c2\u5bdf\u522b\u4eba\u505a\u67d0\u4e8b\u3002
observe sb doing sth \u5219\u6307\u65e0\u610f\u5730\uff0c\u6070\u597d\u770b\u5230\u67d0\u4eba\u6b63\u5728\u505a\u67d0\u4e8b
\u611f\u5b98\u52a8\u8bcd see, watch, observe, notice, look at, hear, listen to, smell, taste, feel + do \u8868\u793a\u52a8\u4f5c\u7684\u5b8c\u6574\u6027\uff0c\u771f\u5b9e\u6027\uff1b+doing \u8868\u793a\u52a8\u4f5c\u7684\u8fde\u7eed\u6027\uff0c\u8fdb\u884c\u6027
I saw him work in the garden yesterday.
\u6628\u5929\u6211\u770b\u89c1\u4ed6\u5728\u82b1\u56ed\u91cc\u5e72\u6d3b\u4e86\u3002(\u5f3a\u8c03"\u6211\u770b\u89c1\u4e86"\u8fd9\u4e2a\u4e8b\u5b9e)
I saw him working in the garden yesterday.\uff08\u5f3a\u8c03"\u6211\u89c1\u4ed6\u6b63\u5e72\u6d3b"\u8fd9\u4e2a\u52a8\u4f5c\uff09
\u6628\u5929\u6211\u89c1\u4ed6\u6b63\u5728\u82b1\u56ed\u91cc\u5e72\u6d3b\u3002
\u5178\u578b\u4f8b\u9898
1\uff09They knew her very well. They had seen her ___ up from childhood.
A. grow B. grew C. was growing D. to grow
\u7b54\u6848\uff1aA\u3002\u56e0\u9898\u610f\u4e3a\uff0c\u4ed6\u4eec\u770b\u7740\u5979\u957f\u5927\uff0c\u56e0\u6b64\u5f3a\u8c03\u7684\u662f\u6210\u957f\u7684\u8fc7\u7a0b\uff0c\u800c\u975e\u6b63\u5728\u957f\u7684\u52a8\u4f5c\uff0c\u56e0\u6b64\u7528see sb do sth \u7684\u53e5\u578b\u3002
2\uff09The missing boy was last seen ___ near the river.
A. playing B. to be playing C. play D. to play
\u7b54\u6848A. \u672c\u9898\u5f3a\u8c03\u5176\u52a8\u4f5c\uff0c\u6b63\u5728\u6cb3\u8fb9\u73a9\uff0c\u5e94\u6b64\u7528see sb. doing sth\u53e5\u578b\u3002
这个表示观察某人做某事的整个过程，就是指有意识地去观察别人做某事。
observe sb doing sth 则指无意地，恰好看到某人正在做某事
扩展阅读：www.sony.com.cn ... confine sb to do ... xbox series x ... watch sb do ... be opposed to doing ... serve something to ... obviously ... observe sb doing ... observe sth done ...
