Make the sentences passive:
1 Tom wrote this letter yesterday.
2 a postman collects the mail twice a day
3 I'll buy the flowers tomorrow
4. She asks me every day
5 they paint pictures every day

1 This letter was written by Tom yesterday.2 The mail is collected by a postman twice a day.3 The flowers will be bought by me tomorrow 4 I am asked by her every day5 Pictures are painted by them every day.