1.   It is compulsory for motorcyclists to wear a helmet.  TO
     You on a motorbike.

2.  We regret buying such a big house.  SHOULDN'T
     We such a big house.

3.  I couldn't wear jeans to work in my previous job.  ALLOWED
     I jeans to work in my previous job.

4.  The sign says 'Don't walk on the grass', but nobody takes any notice.  AREN'T
     You on the grass, but nobody takes any notice.

5.  Please turn off your laptop. It might interfere with the flight instruments.  BETTER
     You your laptop. It might interfere with the instruments.

6.  Camping is strictly prohibited in most national parks.  AREN'T
     You in most national parks.

7.  The best thing to do would be to apply for a transfer to a different department.  TO
     You really for a transfer to a different department.

8.  We took sandwiches, but they weren't necessary.  TAKEN
     We sandwiches.

9.  You can't use mobile phones in this carriage.  NOT
     The use of mobile phones in this carriage.