范文：
The past tense of the verb "understand" is "understood." For example, in a sentence, you might say, "I understood the lecture clearly last night."
常见问答知识清单：
1. What is the past tense of "understand"?
2. How do you form the past tense of "understand"?
3. Can "understood" be used in a question?
4. Is "understood" the same as "understood" in British English?
5. Can "understood" be used as a noun?
6. What is the past participle of "understand"?
7. How do you use "understood" in a negative sentence?
8. Can "understood" be used in the progressive tense?
9. What is the difference between "understand" and "understood" in terms of meaning?
10. How do you use "understood" in a formal context?
详细解答：
1. What is the past tense of "understand"?
The past tense of "understand" is "understood." It is used to describe an action that was completed in the past.
2. How do you form the past tense of "understand"?
To form the past tense of "understand," you simply change the "d" at the end of "understand" to "ed." This creates the past participle "understood," which is also the past tense form.
3. Can "understood" be used in a question?
Yes, "understood" can be used in a question. For example, "Did you understand what I said?" Here, "understood" is used as the past participle to form the question.
4. Is "understood" the same as "understood" in British English?
Yes, "understood" is the same in both American and British English. There is no difference in spelling or usage.
5. Can "understood" be used as a noun?
Yes, "understood" can be used as a noun, meaning an act of understanding or the state of being understood. For example, "His point of view was beyond my understanding."
6. What is the past participle of "understand"?
The past participle of "understand" is also "understood." It is used in perfect tenses and passive voice constructions.
7. How do you use "understood" in a negative sentence?
In a negative sentence, "understood" can be used to express that something was not understood. For example, "I didn't understand the instructions."
8. Can "understood" be used in the progressive tense?
Yes, "understood" can be used in the progressive tense. For example, "I was understanding the text when the phone rang."
9. What is the difference between "understand" and "understood" in terms of meaning?
"Understand" is the base form of the verb, used to describe the action of comprehending or knowing. "Understood" is the past tense and past participle form, used to describe an action that was completed in the past or to show that something was comprehended.
10. How do you use "understood" in a formal context?
In a formal context, "understood" is often used in written communication, such as in contracts or formal letters. For example, "I confirm that the terms and conditions have been fully understood by both parties."
