Bonjour
1- It'll be quicker If you go by train.
2- If I had seen the signal, I would have stopped.
3- If I had known he was in London, I would have tried to meet him.
4- I'd read if I had more time.
5- You'd be healthier If you would take more exercise.
6- I would have enjoyed the visit if it hadn't rained all the time.
7- If you speak more slowly I'll be able to understand you.
8- I won't finish unless I work all night.
9- I wouldn't worry if I were you.
Explications
On ne dit pas "if I was you" mais "if I were you"
If + futur => principale au présent
If + prétérit => conditionnal présent
If + pluperfect ==> conditionnel passé
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Bonne journée
