Выписать из текста предложения с глаголами в форме причастие или герундий и сослагательное наклонение. the internal combustion engine is a machine that develops power from the combustion of fuel within a cylinder. the cycle of operation is as follows: a) suction stroke- just before the piston reaches the inner dead-centre, a valve, usually of the "poppet" type, is opened. on its outward stroke, the piston draws into the cylinder an explosive mixture of air and fuel vapour. shortly before the piston reaches the outer dead-centre, the inlet valve is closed and the compression stroke begins. 1. compression stroke- during this stroke, the whole of the gas in the cylinder is compressed into the free space at the head of the cylinder. 2. explosion, or working stroke- when the compression stroke is almost complete, the explosive mixture is ignited by an electric spark or by other suitable means. the gases reach their maximum pressure almost immediately, and work is done until the piston has again reached a position just before the outer dead- centre, when a second exhaust valve is opened. if the ignition takes place too late, the piston begins its outward journey before the maximum pressure is developed and power is lost. if, on the other hand, the explosive mixture is ignited too early, the maximum pressure is reached before the piston has completed its inward journey, and engine is slowed down or even stopped. d) exhaust stroke- the burnt gases are driven out in front of the and its return until the inlet valve again opens, when the cycle is repeated.
2) She has just posted those letters. Those letters have just been posted.
3)The teacher has already checked my test.My test has just been checked
4)he has lost the key.The key has been lost
5)We have opened all the windows.All the windows have been opened
6)I have bought bread on the way home.Bread was Bread has been bought on the way home
7) I have done this exercise. This exercise has been done.
Autumn holidays only last week, sometimes ten days. Do not have time to really relax, as the time has come to school. But quickly wean get up early in the morning. And then in the morning barely crawl out of the bed.
I usually spend my autumn vacation home. The weather is already cold and rainy, so the street is not particularly a walk. At home, I read the book, or rummage in the Internet. If the sun peeps, I go out into the yard. In the evenings we play with dad at checkers, backgammon and other board games.I love autumn vacation
Я люблю осенние каникулы. Они дают передышку в учебе. Только жаль, что они такие короткие.Осенние каникулы только за неделю, иногда десять дней. Не успели толком отдохнуть, как уже пора в школу. Но быстро отучить вставать рано утром. И потом утром еле выползаю из кровати.Обычно я провожу осенние каникулы дома. Погода уже холодная и дождливая, поэтому на улице особо не погулять. Дома я читаю книги, или роюсь в Интернете. Если выглядывает солнце, я выхожу во двор. По вечерам мы играем с папой в шашки, нарды и другие настольные игры.Я люблю осенние каникулы