Past Indefinite Работа 43
1. Раскройте скобки, употребляя глаголы во времени
Present Indefinite hru Past Indefinite.
1) What flowers Larry (to plant)
last
evening?
2) Kathie (not to swim)
in the sea,
because she can't swim.
3) Peter (not to see)
his mother in
the shop yesterday.
4) Leslie (to drive)
you to school last
Monday?
5) No, he (not to do)
I (to go)
to school by myself.
6) Ella usually (to clean)
her flat on
weekend?
7) Benjamin (not to have)
brothers or
sisters.
Pros
Solving the food problem
Economical use of agricultural land
Obtaining plant medicines, plant vaccines
Plant resistance to viruses, diseases, pests, pollution
High yield of transgenic plants
Improving the quality of plant varieties
Minuses
The tests carried out are short-term, the effect may affect the offspring
Spontaneous transfer of foreign genes from transgenic to non-transgenic organisms
The emergence of resistance to insecticidal toxin
Damage to harmless insects
The development of allergic reactions
The possibility of mutations
1. The police found some fingerprints on the wall, didn't they?
2. Canterbury was a Roman town once, wasn't it?
3. There has been a lot of rain this spring, isn't there? (Конструкция с it будет выглядеть иначе, например: It has been a rainy spring, hasn't it?)
4. That didn’t seem a very important book, did it?
5. Jenny hadn’t arrived when we got to sleep, had she?
6. Nothing interesting happens this week, does it?
7. I’m not disturbing you with my presence, am I?
8. Your mum has been working in this factory for a long time, hasn't she?
9. Hens can fly for short distances, can't they?
10. You have never been to Sweden, have you?
Правило образования разделительных вопросов:
Если первая часть вопроса имеет утвердительную форму, то вторая часть — отрицательную. Вс глагол ставится в том времени, в котором стоит глагол-сказуемое.
Если же первая часть вопроса представляет собой отрицательное предложение, то вторая часть будет в утвердительной форме.