【知识点】
这个文档是针对七年级下册英语的语法复习练习，主要涵盖了动词的过去式和时态的运用，具体包括以下几点：
1. **动词过去式**：文档中给出了20个动词，要求写出它们的过去式。例如：
- `is/am` -> `was`
- `fly` -> `flew`
- `find` -> `found`
- `drink` -> `drank`
- `play` -> `played`
- `go` -> `went`
- `make` -> `made`
- `do` -> `did`
- `dance` -> `danced`
- `worry` -> `worried`
- `ask` -> `asked`
- `eat` -> `ate`
- `draw` -> `drew`
- `put` -> `put`
- `throw` -> `threw`
- `kick` -> `kicked`
- `pass` -> `passed`
- `live` -> `lived`
- `know` -> `knew`
2. **一般过去时**：在第二部分的填空练习中，学生需要根据语境填写动词的一般过去时形式，如：
- `be`动词的一般过去时是`was/were`，如`I was at school just now.`，`They were on the farm a moment ago.`等。
- 行为动词的一般过去时，如`Lucy lived in Changchun two years ago.`，`The cat ate a mouse last night.`等。
3. **现在进行时**：在练习中也有涉及，例如`Joy is always playing her toy in her room.`表示现在经常性的动作，`Joy is playing her toy in her room now.`表示此刻正在进行的动作。
4. **一般过去时与现在进行时的对比**：通过题目如`Joy always played her toy in her room.`与`Joy is playing her toy in her room now.`，让学生理解不同时态在表达不同时间状态上的区别。
5. **过去进行时**：如`They were coming to China last month.`表示在过去某一时刻或某段时间内正在进行的动作。
6. **一般现在时与一般过去时的结合**：在对话或叙述中，如`—What did Tom do last Saturday evening? —He watched TV and read an interesting book.`，展示了如何在同一次交谈或叙述中交替使用一般过去时和一般现在时。
7. **否定句的构成**：例如`My mother didn't do housework yesterday.`，`Jack didn't clean the room just now.`，通过助动词`didn't`表示过去时态的否定。
8. **疑问句的构造**：如`How many people were there in your class last term?`，`What time did you get to Beijing yesterday?`，展示了过去时态疑问句的构造。
9. **含动词`be`的一般过去时的There be句型**：例如`There was an apple on the plate yesterday.`，`There were some milk in the fridge the day before yesterday.`。
10. **动词短语**：练习中出现了如`pick up`，`have a party`，`come to China`，`read English`，`begin to learn`等动词短语的一般过去时形式。
通过这些练习，学生可以巩固对过去时态的理解，学习如何正确使用动词过去式和不同的时态来描述过去的事件。同时，这也涉及到动词变化规则，如规则动词与不规则动词的变化，以及在句子中动词形式的调整。这是一套全面且实用的语法复习材料，旨在帮助学生提升英语语法能力。
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