Question

把下面的句子改为被动语态

The teacher helped the boys work out this maths problem.

 

Answer 1

答案：
解析：

The boys were helped to work out this maths problem by the teacher. 谓语动词helped有一个复合宾语，宾语是the boys，work out this maths problem是动词不定式作宾语补足语。在改成被动语态时，原句中的the boys做主语，谓语动词改成被动语态为were helped，宾语补足语不动。但是因为是不定式，所以要带to，原句中的主语the teacher变成by的宾语。