Question

我永远不会忘记我加入共青团的那一天。翻译成英语，并说明句式

翻译成英语，说明句式，划分句子成分。

Answer 1

先将原句补充成完整形式，“我将永远不会忘记我加入共青团的那天。”
再进行翻译，I will never forget the day when I became a member of the Communist Youth League of China.(中国共青团)
句子是宾语从句，I will never forget the day 属于主句部分，when I became a member of the Communist Youth League of China 是作主句的宾语，可见又是一个完整的句子，由when引导，故叫宾语从句。
宾语“我加入共青团的那一天”是表示时间的成分，只能由when来引导。
I (主语) will （情态动词） never（时间状语） forget（谓语动词） the day when I became a member of the Communist Youth League of China（宾语）.
其中，宾语是句子，所以还可划分，the day（原句宾语）when（宾语从句的引导词）I （从句主语）became（从句谓语） a member（宾语）of the Communist Youth League of China（作为定语修饰宾语的部分）.

Answer 2

I will never forget the day I became a 共青团员。吼吼吼～～～

Answer 3

I'll never forget the day i became a part of the Communist Youth League.

Answer 4

一楼的太搞笑了 嘿嘿
给你个补充好的
I will never forget the day I became a member of the Communist Youth League.
解释 the day (that) I became 中 that 省略
I became a member of the Communist Youth League. 定语从句作the day 的定语。
I 主语
will 情态动词
never 状语 修饰的是forget
forget 作谓语
the day 是宾语