1 Mark never used to be that lazy.
2 When they announced that our flight was cancelled, we had been waiting for two hours.
3 I was about to wash the car but then John care over then I never got round to it.
4 I slept until we had arrived at our destination
5 The last bus had left by the time we got to the bus terminal
6 Jason would bite his nails when he was a boy
7 We heard a funny noise coming from the cockpit while flying to Colombo
8 It was the first time I had sushi and i liked it
Lomov and Natalia are 2 of the characters in the story " <span>A Marriage Proposal by Anton Chekhov.
</span>Lomov first proposed but ended up arguing with Natalia and Natalia's father, <span>Tschubukov. They argued about who owns the Oxen meadows which Natalia's family persistently claimed </span> that they owned the meadows for long. However, Lomov do not want to give up the meadows and told <span>Tschubukov and Natalia that</span> he has all the documents to prove that he owns the meadow.
When Natalia found out the purpose of Lomov's visit, she was disappointed with his father for not telling her. They were sorry that they made Lomov mad. And so, they decided to call him back.
When Lomov visit Natalia again, he could not tell her directly that he wanted to marry her, so he keeps beating around the bush. Natalia and Lomov conversed. To break the silence, Lomov talks about his lamed dog, Guess, whom he is very proud of. Natalia then added that her dog,Leap, is far better than his. So, they argued and the proposal was again forgotten.
No they aren't proper to use in writing class they are considered slang. It would show your teacher that your not interested in sounding educated and proper.
Hope this helps!