Dưới đây là dạng đúng của động từ trong ngoặc:

1. Last night, we **were watching** television when the power **failed**.
2. We **will have been** in this class for 4 years next September.
3. When we came in, they **were preparing** the meal for us.
4. There **have been** many changes in our village in the past few years.
5. Think carefully. I'm sure you **will remember** his name.