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(Active Voice, Affirmative Form)
to have + V3
| Present Perfect Tense | I (you, we, they) He (she, it) | have + V3 has | These cells have divided today. Cell has divided into two ones this week. |
| Past Perfect Tense | I (he, she, it, you, we, they) | had + V3 | Yesterday he had written an article before you came. |
| Future Perfect Tense | I (we) He (she, it, you, they) | shall have + V3 will have | Tomorrow the cells will have divided into two ones by 3 p.m. |
Ex. 5. Read and translate the following sentences:
1. Research works of many scientists have helped to estimate that the rate of heart beat increases depending on the different emotions. 2. They have already performed on some operations. 3. Professor has lately published new book on the functions of the cell. 4. Physicians had determined the cause of disease by 8 o'clock p.m. 5. Tomorrow they will have written an article before you come.
Ex. 6. Put the verbs into correct tense forms:
1. Physiologists (to determine) that new cells are produced by cell division. 2. The scientists (to discuss) the mechanisms and physiological changes occurring during cell division. 3. He (to estimate) that mitosis is the division of the nucleus into two nuclei. 4. Our studies (to show) that one member of each autosomal pair is derived from the person's father, and the other is derived from the mother. 5. Heart transplantation (to become) a routine procedure.
Ex. 7. Translate the following sentences into English:
1. Пацієнт відновив (to restore) своє здоров’я до кінця вересня. 2. Він погано спав до того, як прийшов лікар. 3. Він вже оглянув усіх пацієнтів. 4. Вчені відзначили серйозні зміни в структурі клітини. 5. Ми закінчили свої дослідження щодо (on) поділу клітини.
MODAL VERBS:
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