Помогите с англ, пожалуйста

1. You went to bed very late last night and you are feeling tired now.
If you hadn't gone to bed very late last night you wouldn't be feeling tired now.
2. We can't go boating as it is raining hard.
We could go boating if it wasn't raining hard.
3. Bill didn't check his composition carefully and there are a lot of mistakes in it.
If Bill had checked his composition carefully there wouldn't be a lot of mistakes in it.
4. Nick fell off his bicycle yesterday because he was driving too fast.
Nick wouldn't have fallen off his bicycle yesterday if he hadn't been driving too fast.
5. She'll never master Greek, she isn't good at languages.
If she were good at languages, she would master Greek.
6. He has a sore throat as he ate two ice creams yesterday.
If he hadn't eaten two ice creams yesterday he wouldn't have a sore throat.
7. We enjoyed our visit to the country because the weather was fine.
We wouldn't have enjoyed our visit to the country if the weather hadn't been fine.
8. I feel bored as the lecture isn't interesting.
I wouldn't feel bored if the lecture were interesting.
9. I haven't invited him as I couldn't get in touch with him.
I would have invited him if I had been able to get in touch with him.
10. He is not bright, he cannot remember simple things.
If he were bright he would be able to remember simple things.
11. She is not you, she behaves in her own way.
If she were you she wouldn't behave in her own way.
12. I don't have a typewriter, so I cannot type the paper.
If I had a typewriter I would be able to type the paper.
13. Under different circumstances your proposal would be most welcome.
14. That would have been useful a month ago.
15. Another person would have acted differently.