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1. I couldn't see the teacher because he A. had left before I arrived at the school. yet.
2. He was very tired because he B. had carried the bags upstairs.
3. I was starving when I arrived home. I C. hadn't eaten anything for two days.
4. He asked me to give his book back but B. had lost it.
5. The boy knocked the door. There was nobody inside. His mother C. hadn't returned yet.
6. The sun was shining and the birds were singing when she got out. What a lovely day, she said to herself. She looked at her car but it was not there. Somebody C. had stolen it.
7. She answered all of the questions in the exam because she B. had studied very well.
8. It was sunny but very cold. The snow A. hadn't completely melted yet.
9. Clara looked out the window. The pavement was wet. It D. had rained at night.
10. He couldn't believe his eyes! His father C. had bought him a new laptop as a birthday gift.

Explanation:

The past perfect tense is a change in the form of the verb to express that there was an event or action that was completed at some point in the past, before another action also occurred. Basically, the past perfect tense is a combination of the simple past tense and the present perfect tense. Well, what is characteristic of this tense is the auxiliary verb "had".

The formula for the past perfect tense is as follows:

• (+) S + had + past participle (verb 3)
• (-) S + had + not + past participle (verb 3)
• (?) had + S + past participle (verb 3)  

The following are examples of past perfect tense sentences based on the formula above:

• (+) When I arrived in Manila, Rara had already returned to Cebu.
• (-) She had not studied Korean before she moved to South Korea.
• (?) Had your father watched the movie before they gone home?

Learn for more about:

Past Perfect Tense brainly.ph/question/5720103?referrer=searchResults

Simple Past Tense brainly.ph/question/8225325?referrer=searchResults

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