I could really want a large glass of beer.是什么意思？

I could really want a large glass of beer.

我真想要一大杯啤酒。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

really

adv. 真，真正，实在，果真，实际上，事实上；

例句
It's not really suited to absolute beginners...
它并不真正适合从零开始的初学者。

want

v. 想要，希望，打算，需要…在场；n. 需要的东西，缺少，贫穷；

例句
I want to be honest, honest above everything else.
我想要做到诚实，一切以诚实为上。

large

adv. 大大地，夸大地，详细地，顺风地；adj. 大的，大规模的，大型号的，广泛的；v. 玩个痛快，（尤指跳舞和饮酒）作乐；

例句
The banks would be forced to absorb large losses...
银行将被迫承受巨大的损失。

glass

n. 玻璃，玻璃制品，镜子；vt. 给某物加玻璃，反映，使平滑如玻璃；vi. 成玻璃状；

例句
Mitzi nodded a perfunctory acknowledgement as her glass was filled.
杯子被倒满时米芝敷衍性地点头示意。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

beer

n. 啤酒，麦酒，（一般）发酵饮料，[印，纺]比尔；

例句
On a table pushed against a wall there were bottles of beer and wine.
在一张靠墙的餐桌上有啤酒和葡萄酒。