REwrite the sentences using should/ought to, shouldn039;t/oughtn039;t to, have to, don039;t

REwrite the sentences using should/ought to, shouldn't/oughtn't to, have to, don't have to, has to, doesn't have to
1 It's a good idea to brush your teeth after meals.
You.................................
2 It is necessary to switch off your mobile phone during exmas.
you..................................
3 It isn't necessary for us to get up early at the weekends/
We.....
Как это делать???? Спасибо