"each"后面通常跟 单数名词。例如：
1. Each student has a book.
2. Each of the children received a gift.
3. They talked about their experiences one by one.
然而，如果"each"强调的是"集体"或先行词是复数，或者先行词的主语是由两个或两个以上的单数名词或两个复数名词组成时，谓语动词和相关的物主代词则用复数。例如：
1. Each of them is responsible for their own actions.
2. Each of the teams will present their project.
此外，"each"后面也可以跟不可数名词或复数名词，但这通常需要借助介词"of"或其他结构。例如：
1. Each of us has our own strengths and weaknesses.
2. Each of the teams worked together to complete the project.
总结：
"each"后面通常跟单数名词。
如果强调"集体"或先行词是复数，可以用复数名词，但需要借助介词或其他结构。
在某些情况下，"each"后面也可以跟不可数名词或复数名词，但这通常需要借助介词"of"或其他结构。