1.If he doesn't revise his exams, he will get bad marks.

2.If the COVID-19 pandemic isn't dangerous, we will go on holiday.

3.If he is busy, he won't come.

4.If she isn't ill, she will go to work.

5.If the Italian team plays well, it will win the world cup.

Đề như thế này không làm sát nghĩa đc, sr bạn

`1.` He won’t revise for his exam, so he may get bad marks
If he revised for his exam, he might get good marks.
`2.` We may not go on holiday this summer because the epidemic COVID 19 is very dangerous
If the epidemic COVID 19 weren't very dangerous, we might go on holiday this summer.
`3.` He will not come because he may be busy
If he might not be busy, he would come.
`4.` She may not go to work because she is ill
If she weren't ill, she might go to work.
`5.` The Italian team plays very well, so it may win the world cup
If the Italian team didn't play very well, it might not win the world cup.