改为一般现在时和过去式造句..

一般现在时
He answers the phone at home.
I write an e-mail to my friend twice a week.
My mother cooks dinner every day.
My uncle writes a report every week.
I often collect stamps.
She usually rides a bike to school.
He often makes kites at weekends.
We usually take pictures in the park.
Amy usually goes to school at 7 o'clock every day.
John comes from England.
My sister usually plays the violin after school.
We usually go home at 4:30 p.m.
一般过去时：
He answered the phone yesterday.
I wrote an e-mail to my friend last Sunday.
My mother cooked dinner yesterday.
My uncle wrote a report last Saturday.
I collected stamps last year.
She rode a bike to school yesterday.
He made kites last weekend.
We took pictures in the park last Sunday.
Amy went to school at 7 o'clock yesterday.
John came from England last year.
My sister played the violin the day before yesterday.
We went home at 4:00 p.m yesterday.
有不明白的请继续追问,
再问： write an e-mail为什么不加s
再答： an e-mail 是一封电子邮件，怎么能加s,加s是复数了，一封应该是单数呀