把下列句子改为被动语态 I often hear Mary sing English songs at home.2.A policeman is running after a theif in the street.
问题描述:
把下列句子改为被动语态 I often hear Mary sing English songs at home.2.A policeman is running after a theif in the street.
答
1.Mary is often heard sing English songs at home(by me).
2.A theif is being run after by a policeman in the street.