At first 和first 有什么区别?

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At first 和first 有什么区别?
At first 和first 有什么区别?

At first 和first 有什么区别?
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.

在第一和第一

在叙述前因后果用at first. 在做事情步骤first时用

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

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