1. I watch TV in the evenings.
2. Where is your brother? - He is in the sitting-room watching TV.
3. Yesterday I didn't watch TV because I was busy.
4. I have just watched this programme.
5. I was watching this film when my father came.
6. I had already watched this film when my father came.
7. I shall have already seen the film by time when my friend comes.
8. It will be an interesting TV programme tomorrow. I am going to watch it surely.
9. Tomorrow in the afternoon I'll be watching an interesting film on TV.
10. You have been watching TV for 4 hours.
11. I found out that I was watching TV for too long.
12. By your coming I'll have been watching TV for an hour.
At present we cannot imagine our life without the Internet. The Internet is necessary for each person. It is an integral part of our life. All people use the Internet on different purposes: for dialogue, for searching the information, for work, for studying, for fun and entertainment. We search something with the help of the searching engine. I think that the most important problem of the Internet is the addiction of people to it. Some people surf the Internet for many days and forget about their relatives and real life.
Везде вместо must можно поставить have to (это тоже самое-должны)