1. Although milk is an excellent source of protein and calcium, millions of people cant digest it.
2. I remember the day when I first performed an operation.
3. I want to know why she decided to study the simplest organisms.
4. If oxygen is denied for even ten minutes, the brain cells die.
5. In order to make some experiments one has to know the methods well.
6. In spite of a great number of studies the work has not been finished yet.
7. Pictures should be taken while the injection is still in progress.
8. The analyses which were made in the laboratory confirmed the diagnosis of the disease.
9. The animals that we prepared for the experiment were intravenously injected.
10. The discussion which was arranged by our group was very interesting.
11. The doctor asked me if I followed the prescribed diet.
12. The doctor who is examining the mans eyes now is our new ophthalmologist.
13. The doctors must know what to do in an emergency.
14. The ointment which I rubbed in relieved the skin irritation in three days.
15. The spread of infection to organ after organ can occur rapidly as the blood carries the infections throughout the body.
16. The surgeon who is performing the operation now is the assistant doctor of our group.
17. The teacher explains that all animals and plants consist of cells.
18. When food is not properly digested, it leads to poisoning of the whole body.
19. Wherever a doctor cant do good, he must keep from doing harm (Hippocrates).
20. You must keep to a regular diet so that your bowels will act normally.
| Im sure you are right. , . | The surgeon the patients are speaking about is very experienced. , , . |
.
1. What method was useful to the problem Dr S. studied?
2. The journal gives some methods the researchers follow.
3. The system is controlled in experiments the investigators make.
4. I do not think the work was very difficult.
5. The research this work is relevant to includes some diseases.
6. The patients knew of the medicine they were given.
7. He examined patients in the room he works in.
8. It was decided to carry out the research in the field Dr S. was one of the pioneers.
9. I see you are busy.
10. Dr N. got for the laboratory he organized some new equipment.
11. In no patients the surgeons had operated on the complications developed.
12. The effects they have tested were beneficial.
13. I know you are right.
14. I feel the experiment will not confirm the hypothesis.
15. The association we studied was also clear from the data.
(THE SEQUENCE OF TENSES)
: - , - ( ).
I operate on patients. (Present Indefinite - )
:
The doctor says: I operated on patients. (Past Indefinite- )
I will operate on patients. (Future Indefinite -)
:
( )
  (Past Indefinite)
that he operat ed on patients.
(!!!) .
The doctor said
 , (Past Perfect)
(Past Indefinite) that he had operatedon patients.
 .
(Future-in-the-Past:
 shallshould/willwould)
that he wouldoperateon patients.
.
 NB! She says: He is a surgeon." She said that he was a surgeon.
 I know they are studying Anatomy. I knew they were studying Anatomy.
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