Hi Doris, you have written a lot of sentences. Great effort!

some sentences

1.His friend was famous for singing. or His friend was a famous singer.
2.The more you eat, the fatter you will get. 
3.When he told me, I knew. 
4.Could you tell me how long does it take to travel from Shanghai to Beijing by airplane？ or how long does it take to fly from Shanghai to Beijing?
5.He can not only speak English but also French.
6.He told us such funny stories, it made us laugh out loud.
7.Today people still make the same things.
8.It surprised me that he passed the exam at last.
9.I've already reminded him to beware of this guy.
10.Football fans are busy with watching the world cup.
11.The teacher asked us to keep the classroom clean and to be quiet. 
12.Children had better do not frequently play computer games try this Children should not play a lot of computer games.
13.From now on, you must be careful.
14. He passed away, but his spirit still lives.
15.He cares about others more than he cares about himself.
16.They work hard so that they quickly finish the work.
17.Make sure all the machines are turned off when you leave.
18.He didn't know why his mother was angry at him.
19.Don't worry, sooner or later you will find your bicycle. 
20.He take pride in finished the hard work in an hour. He was proud that he finished the hard work in an hour.

Capital letter at the start of each sentence. Full stop (.) at the end.

Some sentences

1. His friend was famous for singing
2. The more you eat, the fatter you will be very fat
3. When he told me, I already knew the thing
4. Could you tell me how long it takes to go does from Shanghai from to Beijing by airplane？
5. He can not only speak English, but also speak French
6. He told us such some funny stories that made us laughed out loud
7. Today people still make the same things
8. I it is made me was suprised that he passed the exam at last
9. I've already reminded warned him to beware careful of this guy
10. Football fans are busy with watching the World Cup
11. The teacher asked told us we need to keep the classroom clean and be quiet
12. Children had better do should not frequently play computer games frequently
13. From now on, you must/should be careful
14. Although he has passed away, but his spirit is still alive
15. He cares about others more than he cares about himself
16. They work hard so that to quickly finish the work quickly
17. Make sure all the machines are turned off when you leave
18. He didn't know why his mother was angry at with him
19. Don't worry, sooner or later you will find your bicycle
20. He takes pride in finishing his the hard work in an hour