first, the first time, for the first time 作副词用表示“首次”时，有什么不同？
注：不需要涉及 the first time 用作连词引导状语从句的使用方法。
谢谢专家！
【1】the first time 主要有以下2个使用方法
作为名词词组，作句子主语和表语，后面接that定语从句。
This is the first time that she has come here.
这是她首次来这里
This is the first time that she has experienced disappointment.
这是她首次感觉到失望。
作为连词，引导时间状语从句
Mary was a shy girl the first time I met her.
我首次玛丽时是一个害臊女生。
【2】for the first time是个介词短语，意为“首次，初次，第一次”，一般用作状语，修饰谓语动词，可以放在句首，可以放在句末。
For the first time the governments actually put some money up front.
政府居然预付了一笔钱，这可是有史以来首次。
For the first time in many years, I got carded.
这么多年来，头一回有人要我出示身份证。
Several of these rhododendrons will flower this year for the first time.
这类杜鹃花有的将在今年首度开花。
There is no feeling on earth like winning for the first time.
初尝胜利滋味的感觉真是无可比拟。
【3】first为序数词或者副词，表示最早的;最早的;第一位的，起初，最早;最早;先，作定语或者状语。
She lost 16 pounds in the first month of her diet.
她节食的头一个月就减掉了16磅。
When he first came home he wouldnt say anything about what hed been doing.
刚回到家时，他只字不提自己一直在干什么。
I do not remember who spoke first, but we all expressed the same opinion.
我不记得是哪个最早发言的，但大家全都表达了相同的怎么看。
First, tell me what you think of my products.
先谈谈你感觉我的商品如何吧。
