Ex 8:
1. saw (thấy told --> quá khứ, đổi see thành saw)
2. was (thấy lost --> quá khứ, có see --> was)
3. were (thấy closed --> quá khứ; thấy three restaurants --> were)
4. fought (thấy 1509 --> quá khứ)
5. take (thấy last year --> quá khứ; Did --> take)
6. go (thấy when you were ten --> quá khứ; did --> go)
7. used to talk (thấy never --> hiện tại đơn; children --> used to talk)
8. built (thấy the end of the Second World War --> quá khứ)
9. had (thấy when she was a young girl --> quá khứ)
10. was (thấy When I was five --> quá khứ)