6. Because she missed the bus, she was late.
If she had not missed the bus,she would have been late
7. Peter doesn't study hard, so he can't get good marks.
If Peter study hard,he can get good marks
8. My sister is absent from her class because she has a terrible headache.
If my sister has not a terrible headache,she will not absent from her class
9. Windy didn't come, so we cancelled the meeting.
If Windy had come we would have not cancelled the meeting
10. He was angry, so he didn't say anything.
If he had been angry,he would not said anything
5 sao nha

6. Because she missed the bus, she was late.
--> If she hadn't missed the bus, she wouldn't have been late.
7. Peter doesn't study hard, so he can't get good marks.
--> If Peter studied hard, he could get good marks.
8. My sister is absent from her class because she has a terrible headache.
--> If my sister didn't has a terrible headache, she wouldn't be absent from her class.
9. Windy didn't come, so we cancelled the meeting.
--> If Windy had come, we wouldn't have cancelled the meeting.
10. He was angry, so he didn't say anything.
--> If he hadn't been angry, he would have said something.