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49 Explain the use of the definite time in each sentence:

1 a) I am waiting for the results of my blood analysis. b) I have been waiting for the results of my blood analysis for an hour. 2 a) The surgeon is examining the patient. b) The surgeon has been examining the patient for half an hour. 3 a) The nurse is giving the injections. b) The nurse has been giving the injections for two hours. 4 Professor Petrov delivered the lecture in Physiology yesterday. 5 Professor Petrov has already delivered the lecture in Physiology. 6 Professor Petrov has not yet delivered the lecture in Physiology. 7 Yesterday we got interesting findings after our experiments on animals. 8 We have just got some interesting findings after our experiments on animals. 9 We have not yet got any interesting findings after our experiment on animals.

50 Translate the following:

1 The doctor had finished the examination of the patients when we came there. 2 What are these students waiting for? 3 Did the doctor make exact diagnose of the illness? 4 They were discussing this question at 6 o'clock yesterday. 5 They will be working at the surgical department from 9 till 12 o'clock tomorrow. 6 This Institute developed unique methods for the treatment of this disease. 7 Have you ever used this method of treatment? 8 Vascular surgery has made great progress. 9 We know that this professor has invented a new apparatus. 10 Does this doctor work at your hospital? 11 At present he is performing an operation.

51 Choose the necessary form of the verb:

1 The staff of this hospital (to elaborate) the methods of some complex operations this year. 2 The Institute (to restore) good health to many people last year. 3 This new hospital (to house) five clinical departments. 4 There (to be) a lot of patients in this clinic. 5 Now the doctors of this department (to make) the morning round. 6 They already (to examine) many patients. 7 The nurses (to give) the prescribed drugs to the patients tomorrow. 8 When the doctor (to come) in to the ward yesterday, the nurse (to do) all the procedures.

52 Write these sentences putting the verbs into the correct tense form:

1 I (live) in Washington, though I (stay) in London at the moment. 2 The car isn’t here today because Sheila (use) it. She generally (use) the bus, but the drivers are on strike. 3 We usually (stay) at home on Fridays, but we (come) out tonight because we (celebrate) our anniversary. 4 I (live) in Paris just now, but I (come) from Belgium. 5 I (stay) with my parents at the moment, though I (have) my own flat. 6 They usually (work) at the weekends, though they (not/work) at the moment. 7 He usually (drink) coffee but today he (drink) tea. 8 He (teach) at a language school, though he (work) in a factory at the moment because the school’s on holiday. 9 The business usually (make) money, though it (do) rather badly just now. 10 I (study) French at the moment, but I (not/speak) it very well yet. 11 I usually (work) at night, though I (have) a rest now. 12 They seldom (leave) the office at 6 p.m., but today they (leave) for home at 5 sharp. 13 She (wear) a beautiful black and white silk blouse now, but she usually (wear) costumes. 14 He (drive) his car himself today, though his chauffeur usually (drive) it.

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