## 一、although 和 though的区别

although 和 though同义：虽然；即使；尽管

1.though 常用于非正式口语和书面语，although 更加正式。

2.当让步状语从句指某种假设情况时，通常用though，而不用although

Though all the world were against me, I should still hold to my opinion.

Though everybody deserts you, I will not.

3. although 不能放句末

though可以独立用作副词，常放在句末

She didn’t tell me what she had done, but I know it though.

It’s hard work. I enjoy it, though.

4.though引导让步状语从句时可以倒装，although不能

Bravely though she fought, she had no chance of wining.

## 二、although 和 though 使用时的相同点

1.不能和but一起用

Although / though he has a lot of money, yet/ still he is unhappy.

1，英语的句子有且只有一个主干，主干的核心结构是主谓宾。

2，介词，连词，关系副词，关系代词等属于一种标记，它们标记着一些背景信息，属于搭架在1中主干上的枝叶。

Although he worked hard, but he failed in the exam.

2.although 和though引导让步状语从句时，都常常用省略形式

Although tired, I kept on working.

=Although (I was ) tired,…

The problem, though complicated (= though it is complicated), can be solved without much difficulty.

## 三、Even though和even if

Even 和 though组合表示强调，但even 不能和although组合

even if 和 even though比起“though/although”带有强调意味而显得语气更强。

Even if / Even though we could afford it, we wouldn’t go abroad for our vocation.

## 四、as

as引导的让步状语从句表示“虽然、即使、尽管”，但其引导的让步状语从句必须倒装。

Great as the author was, he proved a bad model.

Ridiculous as it seems, the tale is true.

Child as he is, he can tell black from white.

Badly wounded as he was, he remained quite optimistic.

Try as he would, he could not lift the rock.