Образуйте условные предложения. Не забудьте о смешанных случаях. 1. Не is not a first-class…

Образуйте условные предложения. Не забудьте о смешанных случаях. 1. Не is not a first-class sportsman now because he did nottrain enough last year. If … 2. The pupils were active because they wanted to understand this difficult material. If … 3. The pupils did not understand the homework because they were inat¬tentive. If … 4. The pupils worked hard and did well in their examinations. If … 5. She won't try to enter the foreign languages department because she is not good at foreign languages. If … 6. I shall go to the dentist because I have a toothache. If … 7. He is groaning with pain now because he did not go to the dentist to have his tooth filled. If … 8. She does not go to the polyclinic because she does not need any treatment. If …