Bike— Part 1 채점 보고서

제안: 句子时态和语法错误较明显。回答应直接回应问题并用正确时态（过去式），同时可稍作扩展说明以显得自然和完整。避免冗长，最多5句。可以先用主题句回答，然后用一两句具体细节支持，并用连接词衔接。

예시: Yes, I did — I had a red bicycle when I was about eight. It was my favorite toy and I rode it to school every day, which helped me become more independent and confident.

제안: 内容表达不清且语法错误较多。应先直接给出观点，再用连接词提供原因或对比，细节要具体（例如时间段、原因、例子）。避免口语碎句和不完整疑问句。

예시: They used to be very popular about ten years ago, but their popularity has declined recently because more people prefer cars and shared e-bikes. For example, many young people now choose electric scooters for convenience, so fewer people buy traditional bicycles.

× Yes, I have a bike when I was a child.

✓ Yes, I had a bike when I was a child.

时态错误：句子描述过去的情况，应使用过去式而不是现在时。原句用的是“have”（现在时），与“when I was a child”（过去时间状语）不一致。改为“had”符合过去时间的表达。建议：遇到明确的过去时间（e.g. when I was...，yesterday，last year）时，动词一般用过去式。

× 10 years ago bike is very popular in China, but now? I can't sell bike in my country.

✓ Ten years ago bikes were very popular in China, but now I can't sell bikes in my country.

多个问题合并： 1) 时态不一致：句首有时间标志“Ten years ago”，应使用过去式，故“is”应改为“were”。 2) 单复数问题：表示泛指自行车应使用复数“bikes”或不定冠词“a bike”，原句中单数不恰当。两处都需改为复数形式。 3) 标点与语序：原句中“but now?”的问号不符合语义，改为陈述句“but now”。 4) “can't sell bikes in my country”在语义上是在说现在无法出售自行车，语法无误，但与前句连贯性改善后更自然。 建议：注意句子中的时间状语决定时态；泛指可用复数形式；避免不必要的标点符号。