自行车— Part 1 評分報告

建議: 回答不够自然且含混，语法和用词有明显错误。首先没有直接回应“小时候是否有自行车”——应该用过去时并明确说“没有”。其次句子结构混乱（“he has a back”不合逻辑，想表达借骑兄弟的自行车应说“ride his bike”或“ride on his back”），并且缺乏细节。建议用一到两句直接回答，再用一到两句补充具体细节，例如谁的自行车、什么时候骑、感受或原因。注意时态一致和简单清晰的词汇。

範例: No, I didn’t have a bike when I was a child. Instead, I often rode my brother’s bike when he let me, which was fun but a little scary because it was too big for me.

建議: 回答方向正确但表达模糊和用词不准（“sharing bags”不清楚，可能想说“shared bikes”或“bike-sharing services”）。句子可以更自然并提供具体例子或比较，如在大城市常见、用于短途通勤、与公交地铁互补等。使用连接词使逻辑更清晰，例如先给出观点，然后举例说明。保持一到两句支持细节即可。

範例: Yes, bikes are very popular, especially in big cities. For example, bike-sharing services are everywhere and many people use them for short commutes or to get to public transport.

× No, but I have a brother, he has a back so I can ride his back.

✓ No, but I have a brother; he has a bike so I can ride his bike.

句中将“bike”误写为“back”，且使用逗号连接两个独立分句造成句子结构不佳。首先，back是“背”的意思，不符合语境，应为bike（自行车）。其次，两个独立分句之间应使用分号、句号或连接词来分隔以避免逗号拼接错误（comma splice）。建议：1）把back改为bike以符合语境；2）用分号或句号分开两个独立分句，或者用连词（例如 and）连接。

× Actually, of course. In the big city you can see sharing bags everywhere, so I think it's very popular.

✓ Actually, of course. In the big cities you can see shared bikes everywhere, so I think they're very popular.

原句有几个问题：1）“In the big city”在泛指多座城市时应使用复数形式“big cities”；2）“sharing bags”显然为拼写或词语使用错误，应为“shared bikes”或“shared bicycles”（共享单车）；3）时态与指代不一致，最后用单数“it's”指代复数名词应改为“they're”。建议：将“big city”改为“big cities”，“sharing bags”改为“shared bikes”，并把“it's”改为“they're”以保持数的一致性。