1. "So do I" 用于表达“我也是”，例如当别人说他们喜欢苹果时，你可以说“So do I”来表示你也喜欢苹果。而"So I do" 用于强调，当你被问及是否喜欢苹果时，你可以说“So I do”来强调你确实喜欢苹果。
2. "Cost" 这个词可以指代任何形式的代价，包括时间、金钱和精力。而"paid" 通常只用来指代金钱。"Spend" 则可以指代时间和金钱。
3. 如果你想问得更详细一些，你可以说“Can you explain more?” 或者“Could you provide more details?”。如果你想建议对方多做一些练习来提高语感，你可以说“I suggest you practice more to develop your language intuition.”。如果你建议对方看语法书，你可以说“I recommend you read a grammar book for a more comprehensive understanding.”。
4. The correct sentence should be "Neither she nor I am a doctor." This is because "Neither... nor..."连接两个主语时，谓语动词应与靠近它的主语一致。
5. The correct sentence should be "Come to my office if you are free tomorrow." When using "if" to talk about the future in English, the sentence should be in the present tense.
6. The correct sentence should be "The teacher will get a new house if more new houses are built next year." When there is a "will" in the sentence, the following action should also be in the future tense.
