范文：
The kitchen was a mess after the party. I decided to clean it up right away. By the end of the day, the kitchen was spotless, and I felt a great sense of accomplishment.
（聚会结束后，厨房一片狼藉。我决定立即清理。到了当天晚上，厨房被打扫得干干净净，我感到非常满足。）
常见问答知识清单：
1. What is the past tense of the verb "clean"?
2. How do you form the past tense of "clean"?
3. Can "cleaned" be used as a verb or an adjective?
4. What is the difference between "clean" and "cleaned"?
5. When should you use "clean" and when should you use "cleaned"?
6. How do you use "clean" in a sentence?
7. What is the past participle form of "clean"?
8. Can "clean" be used in the passive voice?
9. How do you conjugate "clean" in different tenses?
10. What is the meaning of "clean" in the past tense?
详细解答：
1. What is the past tense of the verb "clean"?
The past tense of the verb "clean" is "cleaned."
2. How do you form the past tense of "clean"?
To form the past tense of "clean," you simply add the suffix "ed" to the base form of the word. So "clean" becomes "cleaned."
3. Can "cleaned" be used as a verb or an adjective?
"Cleaned" is primarily used as a verb (the past participle form), but it can also be used as an adjective to describe something that has been cleaned, such as "cleaned clothes."
4. What is the difference between "clean" and "cleaned"?
"Clean" is the present tense form of the verb, which is used to describe the action of making something clean. "Cleaned" is the past tense and past participle form, used to describe the action that has already been completed.
5. When should you use "clean" and when should you use "cleaned"?
Use "clean" for actions that are happening now or will happen in the future. Use "cleaned" for actions that have already been completed. For example, "I am going to clean the room" (present) vs. "I have cleaned the room" (past).
6. How do you use "clean" in a sentence?
"Clean" can be used in various sentences. For example:
I need to clean the dishes.
The carpet was cleaned last week.
It is important to clean your hands before eating.
7. What is the past participle form of "clean"?
The past participle form of "clean" is "cleaned," which is also used as the past tense form.
8. Can "clean" be used in the passive voice?
Yes, "clean" can be used in the passive voice. For example, "The room was cleaned by the cleaning crew."
9. How do you conjugate "clean" in different tenses?
Here is how "clean" conjugates in different tenses:
Present simple: I clean, you clean, he/she/it cleans, we clean, they clean
Present continuous: I am cleaning, you are cleaning, he/she/it is cleaning, we are cleaning, they are cleaning
Present perfect: I have cleaned, you have cleaned, he/she/it has cleaned, we have cleaned, they have cleaned
Past simple: I cleaned, you cleaned, he/she/it cleaned, we cleaned, they cleaned
Past continuous: I was cleaning, you were cleaning, he/she/it was cleaning, we were cleaning, they were cleaning
Past perfect: I had cleaned, you had cleaned, he/she/it had cleaned, we had cleaned, they had cleaned
10. What is the meaning of "clean" in the past tense?
In the past tense, "clean" refers to the action of making something free from dirt, impurities, or other unwanted substances. For example, "They cleaned the windows" means that they made the windows free from dirt or grime in the past.
