Quiz and Ans:

He lost his job. That's why he's unemployed.
🡪 If he doesn't lose his job, he won't be unemployed.
Tom didn't meet the boss earlier. That's why he is waiting for him now.
🡪 If Tom had met the boss earlier, he wouldn't have waited for me now.
Mary is feeling sick, because she drank too much last night.
🡪 If she doesn't drink too much, she won't get sick.
You are tired because you are constantly staying up late.
🡪 If you go to bed earlier, you won't be so tired.

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Giải thích: 

Ta có công thức : If + thì quá khứ đơn + would + động từ nguyên mẫu

`1,` If he didn't lose his job, he wouldn't unemployed now.

If + S + V-ed, S + would ( not ) + ... .

`2,` If Tom saw the boss earlier, he wouldn't be waiting for him now.

If + S + V-ed, S + would ( not ) + ... .

`3,` If she didn't drink so much last night, she wouldn't feel ill.

If + S + V-ed, S + would ( not ) + ... .

`4,` If you went to bed earlier, you wouldn't be so tired.

If + S + V-ed, S + would ( not ) + ... .

`\text{Oriana}`