1. 1. How do you construct the past perfect simple tense? Use ‘had’ + past participle of main verb.. Ans: Use ‘had’ + past participle of main verb.

   2. How do you construct the past perfect continuous tense? Use ‘had been’ + past participle of main verb.. Ans: Use ‘had been’ + past participle of main verb.

   3. Look at these three sentences and then answer the question that follows.

   a). When I arrived, they were leaving.Yes. I arrived at the same time as they were leaving Ans: Yes. I arrived at the same time as they were leaving
   b). When I arrived, they left. Yes. I arrived first and then they left. This sentence also implies that they left because I arrived. Ans: Yes. I arrived first and then they left. This sentence also implies that they left because I arrived.		Did I see them?
   c) When I arrived, they had left.No, they had already left before I arrived. Ans: No, they had already left before I arrived.

   4. Now represent the sentences below on the time lines that follow.

   a). When he announced his retirement, he had been working there for 30 years.

b). By the time Marlowe got to the scene, the police had already arrested Drummond.

1. 5. When I arrived she had waitedshe had been waiting for 10 minutes. Ans: she had waited for 10 minutes / she had been waiting for 10 minutes

   Which is correct and why?

   We use the past perfect continuous to show that she waited continuously for ten minutes. Ans: We use the past perfect continuous to show that she waited continuously for ten minutes.