Looking for 100% textbook-authentic solutions for DAV Class 6 English Practice Book Unit 7: Tenses (Part-III) Perfect Tenses? This comprehensive guide provides complete solutions for every single worksheet from Worksheet 1 to Worksheet 6 and Do It Yourself, covering Present Perfect, Past Perfect, and Future Perfect Tenses with formulas, rules, and combined timeline exercises.
Formulas of Perfect Tenses:
• Present Perfect: Subject + has / have + V3 (past participle).
• Past Perfect: Subject + had + V3.
• Future Perfect: Subject + will have + V3.
Worksheet 1: Present Perfect Tense (Recently Completed Actions & Experiences)
Complete the sentences using the Present Perfect form of the verbs given in brackets with ‘just’, ‘already’, or ‘yet’:
1. The bell has just rung (just / ring); please take your seats.
2. I have already submitted (already / submit) my science project to the teacher.
3. The postman has not delivered (not / deliver) today’s letters yet.
4. Have you ever visited (ever / visit) the Qutub Minar in Delhi?
5. They have completed (complete) five chapters of their syllabus this week.
Worksheet 2: Present Perfect vs Simple Past
Fill in the blanks with either Present Perfect or Simple Past depending on whether a specific past time is mentioned:
1. She lost (lose) her keys yesterday. (Specific past time ‘yesterday’ âž” Simple Past)
2. She has lost (lose) her keys; she cannot open the door now. (Result visible in present âž” Present Perfect)
3. Dr. C.V. Raman won (win) the Nobel Prize in 1930.
4. Our school hockey team has won (win) the championship trophy three times.
Worksheet 3: Past Perfect Tense (Earlier Past Action)
Combine each pair of sentences into one using Past Perfect (had + V3) for the earlier action and Simple Past for the later action:
1. The patient died. The doctor arrived after that.
âž” The patient had died before the doctor arrived.
2. The train left platform 1. We reached the station after that.
âž” The train had left before we reached the station.
3. The rain stopped. We stepped out of the shelter.
âž” We stepped out of the shelter after the rain had stopped.
4. The thief escaped. The police arrived at the house.
âž” The thief had escaped before the police arrived at the house.
Worksheet 4: Future Perfect Tense (By a Given Time)
Complete the sentences using Future Perfect Tense (will have + V3):
1. By 5:00 p.m. this evening, we will have finished (finish) all our homework.
2. By next month, the construction company will have built (build) the new auditorium.
3. Before the teacher arrives, the students will have solved (solve) the worksheet.
4. By the end of this year, they will have lived (live) in this city for a decade.
Worksheet 5: News Report in Perfect Tenses
Fill in the blanks in the news report using appropriate Perfect Tense forms:
News Bulletin: Historic Satellite Launch
ISRO scientists have successfully launched (successfully / launch) the advanced weather satellite into orbit today. Before the launch was initiated, engineers had tested (test) all propulsion systems thoroughly. Officials confirmed that the satellite has started (start) sending signals back to the ground station. By tomorrow morning, it will have completed (complete) its first three orbital rotations around the Earth.
Worksheet 6 / Do It Yourself: Error Correction in Perfect Tenses
Correct the grammatical error in each sentence:
| No. | Sentence with Error | Incorrect | Correction & Rule |
|---|---|---|---|
| 1 | I have seen him two days ago. | have seen | saw (‘two days ago’ requires Simple Past) |
| 2 | She had finished her breakfast just now. | had finished | has finished (‘just now’ connects to present âž” Present Perfect) |
| 3 | The train has departed before we reached. | has departed | had departed (Past earlier action requires ‘had + V3’) |
| 4 | By tomorrow, they will has completed the work. | will has | will have (‘will’ always takes base auxiliary ‘have’) |
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