Perfect Tenses Worksheet for Learning Grammar Rules

Problem Overview:

The task involves completing sentences using the perfect tense. The perfect tense is formed by using a form of the verb "have" or "had" followed by the past participle of the main verb. There are three types of perfect tenses:
1. Present Perfect: "have/has + past participle"
2. Past Perfect: "had + past participle"
3. Future Perfect: "will have + past participle"

The instructions specify that you should use the same tense as the verb being replaced in each sentence.

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Solution:

#### 1. Don asked a question.
- Original verb: "asked" (past tense)
- Perfect tense to use: Past Perfect ("had + past participle")
- Answer: Don had asked a question.

#### 2. The puppy spills his water.
- Original verb: "spills" (present tense)
- Perfect tense to use: Present Perfect ("has/have + past participle")
- Answer: The puppy has spilled his water.

#### 3. The girls will wear shoes.
- Original verb: "will wear" (future tense)
- Perfect tense to use: Future Perfect ("will have + past participle")
- Answer: The girls will have worn shoes.

#### 4. My neighbor works at night.
- Original verb: "works" (present tense)
- Perfect tense to use: Present Perfect ("has/have + past participle")
- Answer: My neighbor has worked at night.

#### 5. Vegetables are healthy.
- Original verb: "are" (present tense, linking verb)
- Since this is not an action verb, it cannot be converted to a perfect tense.
- Answer: Vegetables have been healthy. (This is a possible interpretation if we assume a context where the state of being healthy is ongoing and completed.)

#### 6. We went to the party.
- Original verb: "went" (past tense)
- Perfect tense to use: Past Perfect ("had + past participle")
- Answer: We had gone to the party.

#### 7. He completed every task.
- Original verb: "completed" (past tense)
- Perfect tense to use: Past Perfect ("had + past participle")
- Answer: He had completed every task.

#### 8. Julie plays the cello.
- Original verb: "plays" (present tense)
- Perfect tense to use: Present Perfect ("has/have + past participle")
- Answer: Julie has played the cello.

#### 9. The boys shared the cupcake.
- Original verb: "shared" (past tense)
- Perfect tense to use: Past Perfect ("had + past participle")
- Answer: The boys had shared the cupcake.

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Final Answers:

1. Don had asked a question.
2. The puppy has spilled his water.
3. The girls will have worn shoes.
4. My neighbor has worked at night.
5. Vegetables have been healthy.
6. We had gone to the party.
7. He had completed every task.
8. Julie has played the cello.
9. The boys had shared the cupcake.

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Boxed Final Answer:

\[
\boxed{
\begin{aligned}
1. & \text{Don had asked a question.} \\
2. & \text{The puppy has spilled his water.} \\
3. & \text{The girls will have worn shoes.} \\
4. & \text{My neighbor has worked at night.} \\
5. & \text{Vegetables have been healthy.} \\
6. & \text{We had gone to the party.} \\
7. & \text{He had completed every task.} \\
8. & \text{Julie has played the cello.} \\
9. & \text{The boys had shared the cupcake.}
\end{aligned}
}
\]