Tenses review - Examples and exercises

Ejemplo resuelto
Present perfect vs Past simple: "I ___ (live) in Madrid for 10 years." vs "I ___ (live) in Madrid in 2010."

Solution: "I have lived in Madrid for 10 years." (present perfect - still living there, unfinished time). "I lived in Madrid in 2010." (past simple - finished time, specific date). Key: present perfect connects past to present; past simple is finished.

Ejemplo resuelto
Past perfect: "When I arrived, they ___ already ___ (leave)."

Solution: "They had already left." Past perfect (had + past participle) for an action completed BEFORE another past action. Timeline: they left (earlier) -> I arrived (later).

Ejemplo resuelto
Future perfect: "By next June, I ___ (finish) my degree."

Solution: "I will have finished my degree." Future perfect for actions completed before a specific point in the future. "By" is a key marker.

Ejercicios
1. Choose the correct tense: a) I ___ (study) English since I was 6. b) When she arrived, the film ___ (already/start). c) By 2030, technology ___ (change) our lives. d) He ___ (work) here for 5 years before he got promoted. e) I ___ (never/visit) Japan.
2. Rewrite using the correct tense: "I saw the film yesterday" vs "I have seen the film" - explain the difference.
3. Write a paragraph about your life using: past simple, present perfect, past perfect, and future perfect.
4. Correct the errors: a) "I have seen him yesterday." b) "She has been to Paris last year." c) "By then, I finish the exam."
5. Translate: a) Cuando llegué, ya se habían ido. b) He vivido aquí desde 2015. c) Para junio habré terminado.