Past Simple или Past Perfect

1. How many examinations you (to pass) up to now?

2.You (to do) all the exercises on this page?

3. We deeply (to study) the problem.

4. I (to correct) that mistake before but you (to make) it still.
5. A week and a half (to pass) since I (to arrive) at this place, but we (to have) hardly a single fine day.
6. They not yet (to come) from the South.
7. At last I (to translate) the English article, now I shall have a little rest.
8. We (to have) a picnic yesterday but the rain (to spoil) the whole pleasure.

Hot-hotter- the hottest long -longer - the longest short shorter the shortest clever cleverer the cleverest silly sillier the silliest great greater the greatest thin thinner the thinnest thick thicker the thickest fat fatter the fattest nice nicer the nicest warm warmer the warmest cold colder the coldest small smaller the smallest tall taller the tallest hight higher the highest weak weaker the weakest strong stronger the strongest heavy heavier the heaviest light lighter the lightest dry drier the driest white winter the whitest grey greyer the greyest clean more clean the most clean dirty dirtier the dirtiest wide wider the widest deep deeper the deepest brave braver the bravest

"the baby boom" doesn't help: working hands is getting smaller demographic statistics in russia resembles the statistics of the war period: the population is shrinking every year 700 thousand people. mortality is twice that in developed countries, and life expectancy among men is the lowest in the world, 60 years. now if in the country of 142 million people, by 2050 there may remain only 100 million vladimir putin in 2000 indicated that the population decline threatens the very existence of russia. six years later he increased support for mothers and offered a premium for the birth of her second child. the birth rate began to rise, but the mortality rate has not declined, as did not increase lifespan. putin cheered and said that in the next three to four years the country will be able to stabilize the demographic situation. in fact, reasons for optimism are few, and to achieve this goal, increasing the population of the russian federation up to 145 million people, it is impossible, experts say. the head of the center for demography and human ecology anatoly vishnevsky says that one of the "baby boom" does not mean anything: it's possible that people decide to have children now, while this form of the prize, but in the long term the total number of children in families will not increase. the middle class will not tempt the cash payments. scientists attribute the current surge in the birth rate that matured and began to start families, many children of the 1980-ies. but the next generation of parents will be much fewer in number. "in the next few years we will see a sharp decline in the birth rate," warns wisniewski. at the same time, the mortality rate will rise - there will come a time to die post-war generation of children.