！急！详细讲解twice

twice = two times的缩写
所以twice有两次，两倍的意思。
两次：I have been to China twice.
两倍：My book is as big as twice of yours.

越详细越好，从头讲起。
讲明白了我会加分！！！
问题补充：还有,要讲解as...as...

twice的基本含义有两次,两倍等.
一楼的第二个例句"两倍：My book is as big as twice of yours."有错,应为My book is twice as big as yours.此结构为:A+动词+twice+as+形容词+as+B.此处twice的含义为两倍.twice表两次时如:
I have seen the film twice.这部电影我已经看过两次了.

as...as直译为:像什么(事物)一样什么(特征).意译为:达到与什么相同的程度
常见的搭配有:
as soon as: 一...就...
引导一个时间状语从句.如:I'll call you as soon as I finish my homework. 我一完成作业,就给你打电话.
as long as: 1,长达...之久 2,只要...
如:1,She has stayed there as long as three months.
2,As long as you give me the money, I'll serve you well.
as much as:高达...重达...多达...
如:Some of the stones weigh as much as fifteen tons.有些石头重达15吨.