我已经吃过饭了为什么是【I’ve already had lunch】?I’ve用在这里好难理解.

我已经吃过饭了为什么是【I’ve already had lunch】?I’ve用在这里好难理解. i've already had lunch中ve指的是什么? 为什么英语中"我已经看过了"用的是"I've already seen it"而不用"I've already see 在新概念第一册83课中提到了现在完成时!课文上写的是I've already had lunch.I had lunch I've already had lunch过去完成时,这句短语中请问怎么运用理解啊? We're having lunch I'VE already had lunch I had lunch at hal 我吃过中餐了,可否译为 I had lunch already. I've already had lunch.Have you had lunch yet?这是新概念二第4课的课后练习 I've already had lunch.Have you had lunch yet?这是什么时态呢? 我已经吃过晚饭了.I have already had dinner. 新版新概念上写的是i've already had lunch.但是百度词典上写的却是i have had lunch I've already had some中的“I've”是什么意思?是哪个单司的缩写,