1. Millie has been swimming in the sea. 2. I have met a famous person. 3. William has bought a new flat

Present Perfect Tense:
Объяснение:
Present Perfect Tense is used to talk about past actions or states that have a connection to the present. It is formed by using the auxiliary verb "have" (or "has" for the third person singular) and the past participle of the main verb. In the given sentences, "has been swimming," "have met," and "has bought" are all examples of the Present Perfect Tense.

1. "Millie has been swimming in the sea." This sentence indicates that Millie started swimming in the past and the action has a connection to the present. She may have just come out of the water or is still swimming.

2. "I have met a famous person." This sentence suggests that the speaker had the experience of meeting a famous person in the past, and this experience is relevant to the present conversation.

3. "William has bought a new flat." This sentence implies that William made the purchase of a new flat in the past, and this fact is still relevant. It may be a recent purchase or one that has an impact on the present.

Демонстрация:
- Начиная со вчерашнего дня, я работаю над этим проектом. (Starting from yesterday, I have been working on this project.)
- Он уже прочитал эту книгу? (Has he read this book already?)

Совет:
To understand and use the Present Perfect Tense more easily, it"s important to remember that this tense focuses on the connection between the past and the present. It can be used to describe experiences, actions that happened at an unknown time, or actions that started in the past and continue into the present.

To form the Present Perfect Tense, use "have" or "has" followed by the past participle of the main verb. It"s essential to pay attention to subject-verb agreement, using "has" for third person singular subjects and "have" for all other subjects. Additionally, remember that time expressions such as "already," "just," and "yet" are commonly used with the Present Perfect Tense.

Закрепляющее упражнение:
Write a sentence using Present Perfect Tense based on the following prompts:
- I / visit / Paris
- He / read / three books