3道同义句转换（主动→被动）
问题描述：
3道同义句转换（主动→被动）
1.The boy is looking after his mother
2.My mother waters the flowers evertday
3.The students did their homework yesterday
答
1 The boy's mother is being looked after by him.
2 The flowers are watered by my mother everyday.
3 The homework was done by the students yesterday.