TOEFL Speaking Task 4 Sample: Using points and examples from the lecture, explain why and how marine mammals herd fish.

1.子项得分

• 交付 (Delivery): 3

• 语言使用 (Language Use): 3

• 话题发展 (Topic Development): 3

2.预估分数

• 总分: 23

3.表达 回答中的发音大部分清晰，语速适中，但有时会出现不必要的停顿。建议在练习时注意连贯性和自然的语调，尽量减少不必要的停顿。同时，注意正确发音单词，以避免拼写错误。

4.话题发展 回答内容基本上符合题目要求，能够使用讲座中的观点和例子解释为什么以及如何海洋哺乳动物捕捉鱼群。但在组织结构上可以进一步改进，例如在介绍两种方法时使用更清晰的过渡词汇。此外，在描述具体例子时可以更详细地说明原因和结果，以使回答更加充实和有说服力。

5.语言使用

原文及修改：

In this lecture, the professor talks about two methods of how marine mammals hunt fish by chasing fish in a tight group and eat them. First technique is to use natural feature as barrier. For example, the dolphins, they use shore as barrier. They will chase fish, let them between the shore and the dolphins. So there are small area for the fish to swim. So the dolphin will eat those fish easily. Besides, some animals in the deep sea use the temporary conditions to confuse or frighten the fish. For example, a kind of whale, they will dive deep and swim upwards and swim in circles to make bubbles. Those bubbles will frighten fish and let them trapped in the bubble circle. So the whale will easily catch the fish and eat them. These are the two methods that mentioned in the lecture.

In this lecture, the professor talks about two methods of (改为：for) how marine mammals hunt fish by chasing fish (改为：them) in a tight group and eating them. First, technique is to use natural feature (改为：a natural barrier). For example, the dolphins, (改为：dolphins) they use shore as barrier (改为：a barrier). They will chase fish, letting them between the shore and the dolphins. So there are (改为：is a) small area for the fish to swim. So the dolphin will eat those fish easily. Besides, some animals in the deep sea use the temporary conditions to confuse or frighten the fish. For example, a kind of whale, they will dive deep and swim upwards and swim in circles to make bubbles. Those bubbles will frighten fish and let them trapped in the bubble circle. So the whale will easily catch the fish and eat them. These are the two methods that mentioned in the lecture.

修改原因及解释：

1. "of" 改为 "for"，因为在这里表示目的更合适。

2. "fish" 改为 "them"，避免重复使用相同的词汇。

3. 在 "eat" 后面加上 "ing"，使句子保持一致的时态。

4. 在 "First" 后面加上逗号，使句子更清晰。

5. "natural feature" 改为 "a natural barrier"，使表达更准确。

6. "the dolphins," 改为 "dolphins"，避免不必要的定冠词和逗号。

7. "barrier" 改为 "a barrier"，加入不定冠词使句子更完整。

8. "let" 改为 "letting"，使句子保持一致的时态。

9. "are" 改为 "is a"，使句子在语法上更准确。

根据修改建议后的回答（140词）：

In this lecture, the professor talks about two methods for how marine mammals hunt fish by chasing them in a tight group and eating them. First, the technique is to use a natural barrier. For example, dolphins use the shore as a barrier. They will chase fish, letting them between the shore and the dolphins, creating a small area for the fish to swim. So the dolphins can easily eat those fish. Besides, some animals in the deep sea use temporary conditions to confuse or frighten the fish. For example, a certain type of whale will dive deep and swim upwards in circles to create bubbles. These bubbles will frighten fish and trap them within the bubble circle. So the whale can easily catch and eat the fish. These are the two methods mentioned in the lecture.

6.思维导图

- Marine Mammals Hunting
  - Natural Barrier
    - Example: Dolphins
      - Shore as a barrier
      - Small area for fish to swim
  - Temporary Conditions
    - Example: Whales
      - Dive deep and swim upwards in circles
      - Create bubbles to trap fish

7.关键词