Passive voice chuyển thành modal verb: can, could/may, might/will, would/shall, should+be+pp/must/ought to
1.Children ought to read books
2.Lan might take us to the circus
3.We must do homework frequently
4.You should eat a lot of vegetables and fruit
5.Mrs Brown may take us to the circus
6.They will hold a written exam next month
7.I couldn't report that problem for him
8.Will you hold your birthday on March 1st ?
9.My brother can't write a long essay
10.Children ought to drink a lot of milk
11.They might use this room for the meeting
12.People should plant tomatoes and potatoes in spring
13.We shan't repaint these windows
14.Who will Lan write letters to ?