英语句子时态8种造句.然后变为被动

一般过去时、
I bought a book yesterday
A book was bought by me yesterday
一般现在时、
I writes a letter once a week.
A letter is written by me once a week.
过去完成时、
She said that she had finished her job.
She said that her job had been finished by her.
现在完成时、
I have finished my homework.
My homework has been finished by me.
现在进行时、
I am doing my homework now.
My homework is being done by me now.
过去将来时、
He was going to visit Beijing the next month.
Beijing was going to be visited by him the next month.
一般将来时
I will do my homework tomorrow.
My homework will be done by me tomorrow.