The expression It is I is extremely formal and old-fashioned and is unlikely to be used in speech except in a joking way. Me is also sometimes used in very informal speech in place of I if the subject of a sentence has two parts that are connected by and.*It is I的表达方式十分正式而且过时,一般讲话时不用,除非用作戏谑之意。在很不正式的口语中,如果句子的主语有两部分且用and连接,me有时也用于替代I。
My brother and me went camping last weekend. = Me and my brother went camping last weekend.上周末,我和哥哥一起去露营了。
But in ordinary polite use, I is required in such sentences.但在一般礼貌用法中,这类句子中要使用I。
My brother and I went camping last weekend.上周末,我和哥哥一起去露营了。