范文：
标题：happen的过去式
正文：
在英语中，动词"happen"的过去式是"happened"。这个词通常用来表示某件事情已经发生。例如，如果你想要表达“昨天我遇到了一个有趣的事情”，你可以说：“Something interesting happened to me yesterday.”
以下是一些使用"happened"的例句：
1. I didn't know that the party happened last night.
我不知道昨晚聚会已经举行了。
2. The accident happened at 2 o'clock in the morning.
事故发生在凌晨2点。
3. They told me that the meeting happened without me.
他们告诉我，会议在我不知情的情况下召开了。
4. It happened that I was out of town when the phone rang.
正好我在外地的时候电话响了。
5. She realized that she had forgotten to lock the door when she happened to look back.
她回头一看，意识到自己忘了锁门。
常见问答知识清单：
1. What is the past tense of "happen"?
"Happen"的过去式是什么？
2. How do you form the past tense of "happen"?
"Happen"的过去式是如何构成的？
3. Can "happened" be used in a sentence?
"Happened"可以在句子中使用吗？
4. What is the difference between "happened" and "happening"?
"Happened"和"happening"有什么区别？
5. Is "happened" a regular or irregular verb?
"Happened"是一个规则动词还是不规则动词？
6. Can "happened" be used in the present perfect tense?
"Happened"可以用于现在完成时吗？
7. How do you use "happened" in a past continuous sentence?
"Happened"如何在过去进行时句子中使用？
8. What is the past participle of "happen"?
"Happen"的过去分词是什么？
9. Can "happened" be used in passive voice?
"Happened"可以用于被动语态吗？
10. How do you form the question form of "happened"?
"Happened"的疑问形式是如何构成的？
详细解答：
1. "Happen"的过去式是"happened"。
2. "Happen"的过去式是通过在原形动词后加"ed"构成的。
3. 是的，"happened"可以用于句子中，表示过去发生的事情。
4. "Happened"是过去式，表示过去某个时间点发生的事情；而"happening"是现在分词，通常用来表示正在发生或持续发生的事情。
5. "Happened"是一个规则动词，因为它是通过在原形动词后加"ed"来形成过去式的。
6. 是的，"happened"可以用于现在完成时，例如："I have happened to meet an old friend."
7. 在过去进行时中，"happened"的构成是"was/were happening"，例如："She was happening to watch TV when the doorbell rang."
8. "Happen"的过去分词同样是"happened"。
9. 是的，"happened"可以用于被动语态，例如："The meeting was happened without us knowing."
10. "Happened"的疑问形式是将"happened"移到句首，例如："Happened it?" 或者 "Did it happen?"
