( )28.Last winter I often saw some people ________ off the snow in the street.A.to sweep B.swept C我听别人说答案好像是B.为什么啊.不是see sb doing sth 跟often有关系吗?

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()28.LastwinterIoftensawsomepeople________offthesnowinthestreet.A.tosweepB.sweptC我听别人说答案好像是B.为什么啊.不是

( )28.Last winter I often saw some people ________ off the snow in the street.A.to sweep B.swept C我听别人说答案好像是B.为什么啊.不是see sb doing sth 跟often有关系吗?
( )28.Last winter I often saw some people ________ off the snow in the street.A.to sweep B.swept C
我听别人说答案好像是B.为什么啊.不是see sb doing sth
跟often有关系吗?

( )28.Last winter I often saw some people ________ off the snow in the street.A.to sweep B.swept C我听别人说答案好像是B.为什么啊.不是see sb doing sth 跟often有关系吗?
答案:sweep.
see sb doing sth 表示“看见某人正在做某事”,动作正在进行,而see sb do sth.表示“看见某人做了某事”,动作已经结束,完成,句中有often,所以这里用动原sweep.

sweep