Basic grammar check

-Yesterday there were four birds on the grass. Tomorrow there will be four birds on the grass.

-Yesterday Tom drank orange juice. Tomorrow Tom will drink orange juice.

-There are four birds on the grass. Yesterday there were four birds on the grass.
-Tom drinks orange juice. Yesterday he drank orange juice.

The Twits is nasty. Mr Twit is hairy and Mrs Twit is ugly. They are the most horrible people you will ever read about.

Mr Twit and Mrs Twit are always thinking of nasty tricks to play on each other. When Mrs Twit were angry, she gave Mr Twit worms to eat. He didn’t know that there were worms in his dinner. He thought that he were eating spaghetti. He wondered why his dinner was moving!