Geography. Козлова Е.П. - 97 стр.

                          19 Grammar Revision Exercises

     19.1 Времена Indefinite, Continuous и Perfect Active

Таблица 2

       Время                 Present                   Past              Future
                           He swims                  He swam          He will swim
                      (always, usually,       (yesterday, last     (tomorrow, in a
     Indefinite       often, sometimes,       week (month,         week, next
                      seldom, every day)      year), a week ago,   time(month, year))
                                              last time)
                        He is swimming        He was swimming           He will be
                      (now)                   ( all the morning,        swimming
                                              from 2 till 5        (from 2 till 5
     Continuous
                                              o’clock, when you    o’clock tomorrow,
                                              came, at that time   when mother
                                              yesterday)           comes)
                         He has swum             He had swum           He will have
                      (already, still, yet,   (by 5 0`clock               swum
                      recently, today,        yesterday, before    ( by 5 o’clock,
      Perfect
                      just, ever, never,      you come, by the     tomorrow, before
                      this week (month,       end of…)             you come)
                      year))

Translate into Russian paying attention to the forms of the verbs

1. Scientists continue to study Lake Baikal.2. There is a risk that the contamination
will spread to the water wells which supply the city. 3. Scientific investigation of the
Antarctic region has been predominant human activity since the 1950s. 4.In 1972
Ceylon became the Republic of Sri Lanka. 5. Even after a hundred years of
observational study, the oceans remain underexplored and our knowledge of many of
the key-processes occurring within them is still fragmentary. 6. According to
statistics the population of Africa is growing. 7. The north of Canada near the Arctic
is tundra with great forests to the south. 8. Water managers are also becoming
increasingly concerned about the unpredictable effects of climatic variability on
water resources.

Open the brackets and put the verbs in the proper tenses

1. Seismology, the study of the earth’s movements, (become) a science only in the
nineteenth century when special instruments were invented. 2. Geologists (know)
much about the outside of the Earth, but they (be) not quite sure about the inside.
3. Australia (have) several climatic regions, from warm to subtropical and tropical.
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