Task 5. Put the verbs into correct form in either ACTIVE or PASSIVE voice.

Task 5. Active/Passive Voice

1. Jack has changed his hair hairstyle! No one can recognize him! (Active - present perfect, emphasizing the completed action and its result)
2. Eccentric clothes and accessories are not allowed in schools and colleges. (Passive - stating a general rule or prohibition)
3. We designed this car last year and it was a real breakthrough. (Active - simple past, describing a past action)
4. I don't usually buy concert tickets. My brother does (do) it for me. (Active - simple present, stating a habitual action)
5. I went to the seaside on holiday. I was very much impressed as I had never been to the sea before. (Passive/Past Perfect - indicating an action completed before another past action or state)
6. If I were you, I would tell her how much it meant to me. (This is a conditional sentence. The verb 'were' is used in the second conditional for hypothetical situations. The original sentence structure implies a hypothetical scenario, not a verb to be conjugated in active/passive.)

Revised item 6: If I were you, I would tell her how much it meant to me. (This is a standard second conditional structure, 'were' is the correct form for the hypothetical situation.)

Final Answer for Task 5:

1. Jack has changed his hair hairstyle! No one can recognize him!
2. Eccentric clothes and accessories are not allowed in schools and colleges.
3. We designed this car last year and it was a real breakthrough.
4. I don't usually buy concert tickets. My brother does (do) it for me.
5. I went to the seaside on holiday. I was very much impressed as I had never been to the sea before.
6. If I were you, I would tell her how much it meant to me.

Explanation: The choice between active and passive voice depends on whether the subject performs the action (active) or is acted upon (passive). Verb tenses are chosen based on the time frame and aspect of the action (simple past, present perfect, past perfect, etc.). Item 6 uses the subjunctive mood for hypothetical situations.