1. It`s a good idea to study systematically.(should)
2. Is it Ok to call her right now?(can)
3. Don`t tell him that you know the truth.
4.Don`t come if you have a lot of work.(don`t have to )
5.It`s necessary to prepare for a test.(have to )
6. It`s not a good idea to ead sweets.(shouldn`t)
7. Is it OK to take this pen?(can)
8. Don`t touch this button.(mustn`t)
9. Don`t tell me if you don`t want to.(don`t have to)
10. Don`t play with knives.(mustn`t)
2. Is it Ok to call her right now?(can)
3. Don`t tell him that you know the truth.
4.Don`t come if you have a lot of work.(don`t have to )
5.It`s necessary to prepare for a test.(have to )
6. It`s not a good idea to ead sweets.(shouldn`t)
7. Is it OK to take this pen?(can)
8. Don`t touch this button.(mustn`t)
9. Don`t tell me if you don`t want to.(don`t have to)
10. Don`t play with knives.(mustn`t)