Puf the verbs in brackets in the proper tense: 1. The patient (to be) under medical care before the surgeon began the operation.
2. They (to isolate) the patient with the grippe from the others before they were infected.
3. My experiments not yet (to prove) anything since I started them.
4. We (to complete) our observations on the changes in the blood erythrocytes by tomorrow.
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Present Continius — это настоящее время, и глаголы в этом времени употребляются только тогда, когда ты хочешь сказать, что что — то происходит в это время. (Now, at the moment). Когда мы образуем глагол в данном времени, мы добавляем к нему окончание 'ing' (Например: At the moment, I singing the song.) Present Simple — обычное простое время. В этом времени мы говорим о том, что происходит обычно, каждый день. (Seldom, always, ussualy, every day, every week, never). Так же, только в этом времени мы можем употребить глаголы 'ненавидеть', 'любить', рассказать о том, что тебе нравиться. (Примеры — She hates bananas, I don't like apples, You like this singer, We love our mom.) Если будут вопросы или претензии, обращайся :з

My favorite sport is roller skating, because i really love high speeds. sweeping speed of the wind, tacking between passers feel completely free. of course, at first even to stand still on roller skates it was not easy - the legs went home wanting more likely to go on a long journey. numerous bruises, bruises, scratched his hands, torn jeans were the norm. over time, learned to ride on roller skates, i began to take a new "barriers": learn from the older and more experienced colleagues new moves, teach clever tricks. now rollers hidden in the closet and wait for a replacement frame, cracked after jumping from the parapet. walking on the wheels of steel a wonderful way to have fun with friends in the fresh air and gave a lot of good impressions.