Lesson 1: In this lesson, you learned what the Present Perfect Simple is and how to form it using the auxiliary verb "have" or "has" followed by the past participle of the main verb.

Lesson 2: You learned how to correctly form the Present Perfect Simple by following the structure of subject + have/has + past participle of the verb.

Lesson 3: You explored the use of the Present Perfect Simple to talk about past experiences, recently completed actions, and present results of past actions.

Lesson 4: You learned about common words and expressions used with the Present Perfect Simple, such as "just," "already," "yet," and "ever."

Lesson 5: You discovered how to use the Present Perfect Simple with time expressions like "today," "this week," "recently," and "lately."

Lesson 6: You learned about forming questions and answers in the Present Perfect Simple, using the inversion of the auxiliary verb and subject, as well as the corresponding affirmative and negative responses.

Lesson 7: You explored the use of the Present Perfect Simple with the words "just" and "already" in affirmative and negative sentences to indicate completed actions in relation to the present.