forklaringen på fejlsætninger ?

jeg kan godt se hvad der er galt med sætningerne men kan ikke forklare hvorfor :( er der nogle der kan hjælpe ?

1. they were worried about that they had not seen the cat for four days.

2. luckily became he a good doctor.

3. these things could happened to anyone.

4. she has for the last coulple of years tried to bring new colors into their bedroom.

5. her husband, who had recently returned from Afghanistan, was not used to watch television all day.

6. the fantastic about this new care is the level of the innovative thinking when it comes to design.

7. was there any signs that their marriage was falling apart last Christmas ?

8. when the firealarm sounded, was the main building empty in three minutes.

9. The Aboriginis were treated good by the new governor.

10. i can not take his accusations serious.

11. new about important events are always posted on the website.