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satin1988aSovieticebreakingship(helpedfree)threegraywhalesthat(hadbecometrapped)intheArcticiceafterthey(hadswum)intothecostalwatersofAlaska(tofeed).最后的tofeed为什么没错呢?tofeed没有宾语也解释不通

题目详情
sat
in 1988 a Soviet icebreaking ship (helped free) three gray whales that (had become trapped) in the Arctic ice after they (had swum) into the costal waters of Alaska (to feed).
最后的 to feed 为什么没错呢?to feed没有宾语也解释不通啊,


▼优质解答
答案和解析
feed 可做不及物动词,表示动物进食,后跟宾语是需要与介词on搭配,如:Thecows were feeding on hay in the barn.