Bike— Part 1 채점 보고서

제안: 回答不够自然且时态混用。应直接回应并用正确时态描述过去情况，句子不宜太长，最好一至两句并用连接词补充原因或细节。例如说明是否拥有、多久、为什么不擅长或是否学会了。注意主句和从句时态一致。

예시: Yes, I had a bike when I was a child. However, I wasn't very good at riding it at first, because I was afraid of falling and my balance was poor, so I learned slowly with help from my parents.

제안: 回答内容基本明确但有语法和用词问题（可数名词单复数、情态动词时态）。可用一到两句说明原因或举例，使用连接词使表达更连贯。提供具体细节（如常见用途、不同年龄段的使用情况或城市与乡村差异）会更好。

예시: Yes, bikes are very popular in my country. Many people use them for short trips and commuting, especially in cities, because they are cheap, convenient and good for exercise.

× Yes I did, but I'm not good at riding a bike when I was a child.

✓ Yes, I did, but I wasn't good at riding a bike when I was a child.

问题类型：现在时/过去时使用不当。句中包含过去时间状语“when I was a child”，主句应使用过去时而不是现在时“I'm not good”。此外需注意标点与逗号使用。建议：根据时间状语把动词时态改为过去时，写作时注意句内时态一致。

× Of course, bike is a popular vehicle in my country.

✓ Of course, bikes are a popular vehicle in my country.

问题类型：单复数错误。可数名词“bike”在泛指时应使用复数形式“bikes”，且与谓语动词保持一致（are）。建议：当指代一类事物或普遍情况时，使用复数名词或加不定冠词（a bike）并相应调整动词。

× Nearly everyone could ride a bike.

✓ Nearly everyone can ride a bike.

问题类型：现在时/过去时使用不当。问题句想表达一般现在事实（几乎所有人都会骑自行车），应使用情态动词“can”表示能力的现在时，而非过去式“could”。建议：描述普遍真理或现在能力时使用现在时或情态动词can。