主动语态转换成被动语态。一般现在时，现在完成时，一般过去时，一般将来时，现在进行时，每个时态五个句

回答：一般现在时 1. I study English at school ----- English is studied at school .
2. The boy cooks supper after school.------ Supper is cooked after school by the boy . 3. They work hard at a Chinese .------Chinese is worked hard by them .
4. He writes his homework at home.---His homework is written at home by him.
5. She teaches maths very well--- Maths is taught very well by her .
现在完成时 1. He has studied Japanese for 2 years .---- Japanese has been studied for 2 years by him . 2. Mr Li has bought the book .--- The book has been bought by Mr Li . 3 . Li Hao has borrowed the novel .--- The novel has been borrowed by Li Hao,
4. I have visited my mum.---- My mum has been visited by me . 5. He has played football.--- Football has been played by him .
一般过去时 1 He worked hard at English. -- English was worked at .2, The boy cooked supper yesterday. -- Supper was cooked yesterday .3. She taught maths last year.--- Maths was taught last year. 4. He wrote his homework at home just now. --- His homework is written at home just now. 5. I studied English at school last week.--- English was studied at school last week. 一般将来时 1. I will study English at school .----English will be studied at school .2 The boy willcook supper after school.------ Supper will be cooked after school by the boy . 3 They will work hard at a Chinese .-----Chinese will be is worked hard by them .4. He will write his homework at home.---His homework will be written at home by him. 5.He will write his homework at home.---His homework will be written at home by him.
现在进行时1. He is writing his homework at home.---His homework is being written at home by him. 2.The boy is cooking supper after school.------ Supper is being

cooked after school by the boy . 3. They is working hard at a Chinese .------Chinese is being worked hard by them .4. He is writing his homework at home.---His homework is being written at home by him.5. She is teaching maths very well--- Maths is being taught very well by her .