Task 1. Complete the descriptions with invented, discovered, founded, argued. Copernicus, Einstein, Tim Berners-Lee, Marie Curie, Kaisha Atakhanova.
1. … the World Wide Web.
2. … radioactivity and won the Nobel Prize twice.
3. … that the Sun was at the centre of the universe.
4. … the environmental organization Eco Center.
Task 2. Write the definitions of the words ‘DNA, genetics, scientist, knowledge’.
Task 3.Grammar question ‘What is the linker/connectors?’.

The verb to be. Insert appropriate present forms.

A: Hi, Alex. How (1) are you?

B: Hello David. I (2) am fine and how (3) ___are you doing?

A: I (4) amdoing fine.

B: How (5) ___is your sister? Where (6) ___isshe now?

A: She (7) _is in London. She (8) ___islearning English there.

B: Really? That (9) iswonderful! How about your parents?

A; They (10) ___are fine too. They (11) are in Cyprus now.

B: (12) are you busy tonight?

A: Not really, why?

B: We (13) ___are having a party. Would you like to come?

A: I’d love to.

B: Then come to our place at 7:00 p.m.

_+

I - am

He / she - is

We/ they / you - are

1) I am not at work. Am I at work?

2) Mike isn't a doctor. Is Mike a doctor?

3) They aren't glad. Are they glad?

4) My mother isn't in the garden. Is my mother in the garden?

5) My friends aren't happy. Arr my friends happy?

6) Susan isn't in that room. Is Susan in that room?

7) Olga isn't my friend. Is Olga my friend?

8) Marry and Alex aren't at home. Are Marry and Alex at home?

9) I am not sure of it. Am I sure of it?

10) This book isn't interesting. Is this book interesting?

Объяснение:

Так это глагол to be. Вот так образуются отрицательная и вопросительная форма глагола to be. Когда мы хотим сделать отрицательное предложение так мы добавляем not к глаголу to be. А когда вопросительную ставим глагол to be в начало предложение. Думаю объяснила.Удачи!