1 I must read this book
4 They must be playing football in the yard now
5 We must go to visit grandmother
7 You must talk with her
8 They must be talking about this
10 The wearther must be perfect today
2 He had to learn English
3 I have to bring my sister at school,because the mother is ill
6 She had to go in bank and take the document
9 I have to write to my sister about everything