Bike— Part 1 채점 보고서

제안: 句子需要更自然、语法正确并且信息更连贯。注意动词时态和冠词用法（例如“I used to have”后应接复数名词或说明时间），以及数字表达和从句结构。可以先直接回答，再用一到两句具体细节说明时间和原因，使用连接词如“and”或“because”。

예시: Yes, I did. I had two bikes when I was a child: one was a birthday gift and the other was given to me before I started school.

제안: 注意名词和形容词的搭配（如“shared bikes”而非“shared bike”），以及更自然的表达（例如“cheap to rent”比“just cost a little”更地道）。可以用连接词如“because”或“so”来解释原因，并提供具体例子或场景。

예시: Yes, I think bikes are very popular, especially shared bikes. They are cheap to rent and convenient for short trips, so many people use them to commute or run errands.

× Yes I did, I used to have two bikes from my parents, 1 is on my birthday and another is before I'm went to school.

✓ Yes, I did. I used to have two bikes from my parents: one was for my birthday and the other was given before I went to school.

问题类型：过去时态错误。解释：句子中有多处时态和用法不当。1) “1 is on my birthday” 使用现在时和数字“1”不合适，应改为“one was for my birthday”以用过去时并用单词代替数字。2) “another is before I'm went to school” 中同时出现了现在时（is）和错误的过去形式“I'm went”（语法错误）。应改为过去时“the other was given before I went to school”。建议：在描述过去发生的事情时，统一使用过去时态（如 used to, was/were, went）。避免混合现在时与过去时；不要把“I am”与过去式连用。

× There are many shared bike by streets in our country and they just cost a little and many people like to go out by them.

✓ There are many shared bikes on the streets in our country, and they cost very little; many people like to go out on them.

问题类型：介词使用错误及相关名词形式。解释：1) “by streets” 应改为“on the streets” 更符合英语习惯，表示‘在街道上’。2) “shared bike” 应使用复数“shared bikes”与前文的“many”一致（数量问题也涉及主谓一致）。3) “cost a little” 用法不自然，改为“cost very little”或“are cheap”。4) “go out by them” 不常用，应说“go out on them” 或更自然地“use them to get around”。建议：注意常用介词搭配（on the street/on the streets, in the city），并保持名词与数量词一致；用固定表达“cost very little”或“are cheap”。