rewrite the sentences using must.mustnt.should.shouldnt.have to or dont have to
1)its not a good idea to swim immediately after a meal
2)its really important to take this medicine three times a day
3)is it necessary for me to do the exercise?
4)its satudray tomorrow,so its not necessary for me to get up early
5)its a good idea to listen to the weather forecast before you go hill walking
6)i can recommend this book to you-I think you would like it a lot
7)its a good idea to have a medical check-up every two years
8)its very important not to drink the water there.It will make you ill
9)is it really necessary for us to finish the work today?

1.You don't have to swim immediately after a meal.2.You must take this medicine three times a day.3.Should I do the exercise?4.It is Saturday tomorrow so I shouldn't get up early.5.I have to listen to the weather forecast before hill walking.6.I should recommend this book to you - I think you would like it a lot.7.You must have a medical check-up every two years.8.You mustn't drink the water there. It will make you ill.9.We have to finish the work today?