1) no, the
2) not, the
3) no, the
4) no, the
1) the
2) a
3) a
4) a, the
5) the
6) a
6) -, a
7) -, a
Do (быть) добавляется к I (Я), They (Они), We (Они), You (вы,ты)
Does (быть) добавляется к He (Он), She (Она)
Калий, кальций, медь, германий, селен
Past modals
1 Write sentences using have / has and the past participle of the main verb.
I / must / turn off / the computer last night
I must have turned off the computer last night.
1 He hasn't gone to the hospital yet. They can't have operated on him.
2 Helen is crying. She could have had an argument with Ted.
3 Mum isn't here. She might have gone shopping.
4 He looks happy. He must have passed the test.
5 She was on her own. She can't have got together with her friends.
1. don't you? Yes, I do.
2. do you? No, I don't.
3. doesn't she? Yes, she does.
4. doesn't he? Yes. he does.
5. do you? No, I don't.
6. does she? No, she doesn't.
7. don't you? Yes, I do.
8. don't you? Yes, I do.