At first 和first 有什么区别？

Question

如题所述

Answer 1

first有四个词形：adj. adv. n. pron. 这里主要谈adj.和adv.
first adj. 序数词 第一的
Example: He was the first student who arrived at the classroom.
adv. 首先
First I fed the baby. Then I made myself a sandwich.
at first是一个介词短语在句中充当状语
首先
At first I was nervous, but I soon started to relax.
补充一个firstly 修饰句子的副词 首先
The plan was not practical, firstly because of the cost, and secondly because local people did not support it.
通常可互用，但有差别，需查词典体会。

Answer 2

at　first　用于句首阐述一件事情或一个事物
first用于句首只能说firstly

Answer 3

在叙述 前因后果 用at first. 在 做事情步骤first时用

Answer 4

在第一和第一