1.Both you and I are students. both...and...“两者都...”，连接名词或代词作主语时，谓语动词用复数形式，不受‘就近原则’的限制。

Both Li Ming and Wei Hua are good at English.2.and 连接两个成分作主语时，谓语要用复数形式。You and she are on duty today.3.采用就近原则的情况：当连词或连词短语连接两个成分，而重点强调的是“其中之一”的时候，要采用就近原则。Both...and作为关联并列连词，它通常应连接两个相同性质的句子成分，但有时后一成分可能省略与前一成分相同，意思分别为“...和...都”、“不但... 而且... ”、“既... 又...”，用法如下：

1、“...和...都”，连接两个成分作主语，谓语总是用复例：Both she and Lucy were pleased with the cat..她和露西都喜欢这只猫。You and she are on duty today.你和她今天是值日生。

2、“不但... 而且... ”起连接词作用，连接两个并列成例：She both speaks and writes English。她不仅会说英语，而且还会写。

3、“既... 又..连接的两个成分必须在形式、时态、词性等方面完全一致，可以是形容词、名词、动词和句子等，一般语法结构是：both+形容词＋and+形容词例：The results of the research are both impressive and alarming.研究结果既令人印象深刻又令人担忧。both+名词＋and+名词例：Both the movie and the actor were good.电影和演员都很好。both+动词＋and+动词例：Peter both likes and recommends the movie.皮特既喜欢又推荐这部电影。