The missing boys were last seen___ near the river
4个回答
1.正确答案是：A piaying
你的说法没错,感官动词变为被动是要加to.但这里是另一种情形：sb see sb doing 的被动语态.如果我要你把下面的句子变成被动语态：People last saw the missing boy playing near the river.不就成了你的句子了吗?
2.正确答案是：C being praised
咋看起来,似乎该选D praised.其实不然.本题有很大的欺骗性.
你看,如果选 D praised,句子成了Praised by the teacher in the ciass gave him a great deal of encouragement.仔细一看,这句子没了主语.因为在英语中,过去分词短语是不能充当主语的,故不能选D.而动名词（包括其被动形式）短语可做主语.故只能选C being praised ,动名词的被动语态,正好做主语.也就是 Being praised by the teacher in the ciass 是主语,gave 是谓语,him a great deal of encouragement 是双宾语,就是give sb sth嘛!
全句可翻译为“在班里受到老师的赞扬给了他极大的勇气”
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