they watched the fishing boat__for the small island just now
问题描述：
they watched the fishing boat__for the small island just now
a.sail b.was sailingc.to saild.sailed
选哪个?原因?
答
选A,这里watch是感官动词,感官动词后接动词原形或进行时.接进行时是表示看到某人正在做某事.
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