Task III. Complete with the Present Perfect Continuous form form of the verb in brackets 1. My parents (donate) money to WWF for a long time. 2. The eco helpers (plant) the trees all the morning. 3. She (collect) the rubbish to recycle for a week. 4. Engineers (design) the green car for a long time. 5. Tony (talk) on the phone for two hours. 6. I (look) for my keys since 11a.m.

Task III. Complete with the Present Perfect Continuous form:

• 1. My parents have been donating money to WWF for a long time.
• 2. The eco helpers have been planting the trees all the morning.
• 3. She has been collecting the rubbish to recycle for a week.
• 4. Engineers have been designing the green car for a long time.
• 5. Tony has been talking on the phone for two hours.
• 6. I have been looking for my keys since 11a.m.

Explanation: The Present Perfect Continuous is used to emphasize the duration of an action that started in the past and continues up to the present, or has just finished and has a result in the present. It is formed with 'have/has' + 'been' + the '-ing' form of the verb.