“小学一年级的时候”用英语可以说“When I was in Grade One of primary school” 或者 “At the time of Grade One in primary school” 。
以下是对这两种表达的解释：
“When I was in Grade One of primary school” ，“when”表示“当......的时候”，“was”是“am”的过去式，用于一般过去时，“in Grade One of primary school”意思是“在小学一年级”。
“At the time of Grade One in primary school” ，“at the time of”意思是“在......的时候”，“Grade One in primary school”即“小学一年级”。
例如：When I was in Grade One of primary school, I made many friends.（小学一年级的时候，我交了很多朋友。） 或者 At the time of Grade One in primary school, I began to learn how to read. （小学一年级的时候，我开始学习如何阅读。）
