Трилистник (Shamrock)
А вот почему - фиг знает :І
1.What are you doing how? - l'm waiting for a bus. How long have you been waiting for it? - l've been waiting for it for two minutes.
2. l had been sleeping for an hour when he came.
3. It has been raining since the morning.
4. He said that he had been staying there all day.
5. I've been packing my things for an hour and half.
6. The pupils have been discussing the novel which they will read next month for half an hour.
7. The teacher said that she had been correcting our dictations for 2 hours.
8. Since when have they been building this house?
9. I had been looking for my copybook for half an hour, before I found it under the newspaper.
10. The children have been skating for an hour.
Inhalation - ингаляция, inhal - вдыхать;
exhalation - выдыхание, exhale - выдыхать
respiration - дыхание, respire - дышать
expantion - расширение, expand - расширять
exertion - напряжение, exert - напрягать
contraction - сокращение, contract - сокращаться, сжиматься
construction - строительство, construct - строить.
action - действие, act - действовать, играть
acceleration - ускорение, accelerate - ускорять.
Как видите, везде суффикс tion - яркий указатель на часть речи - существительное. Именно благодаря ему от основы глагола образовались эти существительный. Если будет нужна помощь - обращайтесь ко мне в лс на Знаниях, если баллы не хотите тратить :)