Question

Put the verbs given in the Past indefinite or present perfect tenses : 1 yesterday they (to carry out ) their first experiment in the laboratory. 2 he not yet (to graduate ) from the institute . 3we ( to carry out ) many experiments lately . 4 Moscow (to become) one of the most beautiful cities in the world .

Answer 1

1. They carried out
2. He has not yet graduated
3. We have carried out
4. Has become

Answer 2

1 yesterday they carried out their first experiment in the laboratory.

2 he hasn't yet graduated from the institute .

3 we have carried out many experiments lately.

4 Moscow has become one of the most beautiful cities in the world. (можно и became - зависит от предложений по тексту)

Answer 3

Certainly! Let's put the verbs in the Past Indefinite or Present Perfect tenses based on the context:

1. Yesterday they carried out their first experiment in the laboratory. (Past Indefinite) 2. He has not yet graduated from the institute. (Present Perfect)

3. We have carried out many experiments lately. (Present Perfect)

4. Moscow has become one of the most beautiful cities in the world. (Present Perfect)

Explanation:

- In sentence 1, "yesterday" indicates a specific past time, so we use the Past Indefinite tense ("carried out").

- In sentence 2, the use of "not yet" suggests a duration that extends up to the present, so we use the Present Perfect tense ("has graduated").

- In sentence 3, "lately" refers to an unspecified time in the past leading up to the present, so we use the Present Perfect tense ("have carried out").

- In sentence 4, the Present Perfect tense is used to describe a situation that started in the past and continues into the present ("has become").