1. Physics (to be) is one of the most important sciences last century. 2. Physics (not to study) living things, it (to study) phenomena in nature.
3. Phenomena in nature (to be) mechanical motion, heat, sound, electricity, magnetism and light.
4. The basic concepts in all physical phenomena (not to be) the concepts of heat and light.
5. Matter (not to exist) in five states: solid, gas, liquid, steam and plasma. 6. When the teacher (to come) into the classroom yesterday the students (to study) physics.
7. We (not to see) how electrons ( to revolve) about the nucleus.
Поставить глагол в нужной форме

What a beautiful picture! I have not seen it before.(потому что это результат,факт того что я не видела до этого этой красивой картины,а также потому что глагол умственного воспритяия не упртребляется во времена длительного характера.

Where did you buy it?

I am  having it for half a year, but unfortu-

mately don't remember where i have it.Если выберать из вариантов ответа,то c) hadn't seen; did, buy; am having, have

Но я под сомнением. И тогда не  hadn't seen; должно быть а  havn't seen;

Объяснение:

Відповідь:

1. We have already read this book. [A]

2. They have seen the accident... [A]

3. Has Lilian done her hommework?.. [I]

4. Eric has lived in London since 2004. [A]

5. Rose has lived in France for ten years [A]

6. Has Elliot bought a new car? [A]

7. You haven't cleaned the room... [N]

8. Hellen has ever visited Italy. [N]

9. Nina has watched this novel with me. [A]

10. The dog has eaten his bon. [A]

11. Mare has ever flown by plane. [N]

12. Have you ever danced Tango? [I]

13. She has already fogotten the problem [A]

14. My grandparents have lived in France for 20 years. [A]

15. Children have learned ( or learnt) lesson with Mrs Hellen. [A]

16. Susan hasn't watered the plants yet. [N]

17. All her life my aunt hasn't driven on the left.. [N]

[A] - affirmative

[N] -negative

[I] - interrogative