по английскому языку 3 класс учебник​

 When I came in the lecture had already started. Had the lecture started when I came in?
2. They had already translated this text when the bell rang. Had they translated this text when the bell rang?
3. When I came he hadn't left yet. Hadn't he left when I came?
4. When we came to the airport, the plane had already landed.  Had the plane landed when we came to the airport?
5. He suddenly understood that he had travelled in the wrong direction. Had he travelled in the wrong direction?

1) You have already sung merry songs at our Music lesson. Have you already sung merry songs at our Music lesson?
2) My friend and I have been watching educational film at our lessons for 20 minutes. Have my friend and I watched educational film at our lessons?. 
3) We haven't relaxed at the breaks between our lessons. Haven't we relaxed at the breaks between our lessons. 
4) They haven't learnt a poem by heart at our Literature lesson yet. Haven't they learnt a poem by heart at our Literature lesson?
5) We have already written tests. Have we written tests yet?

to see

I saw him do the work. Я видел, что он сделал работу.

I saw him doing the work. Я видел, как он делал работу.

to watch

He watched her read the letter.Он видел, как она прочитала письмо.

He watched her reading the letter. Он видел, как она читала письмо

to notice

They noticed me leave the house. Они заметили, что я вышел из дома.

They noticed me leaving the house. Они заметили, как я выходил из дома.

to feel

We felt the wind blow. Мы почувствовали, что подул ветер.

We felt the wind blowing. Мы почувствовали, как подул ветер.

to hear

I heard him come up the stairs. Я слышал, как он поднялся по лестнице.

I heard him coming up the stairs. Я слышал, как он поднимался по лестнице.