Small as it is,the ant is as much a creature as are all other animals on the earth.

还原为正常语序为

=Small as it is , the ant is a creature as much as all other animals on the earth (are creatures 被省略)

Small as it is , the ant is  as much a creature as all other animals on the earth (are creatures 被省略)

参考译文：虽然蚂蚁体型很小，但是和其它动物一样也是地球上的生物。

老师，这里的 much 是什么词性？句子是什么意思？

解答：much 这是“形容词”句子意思 表示“程度”

解答如下：

句子结构解析:

从句为：as引导倒装结构让步状语从句  （形容词+as+主语+系动词）

主句谓语：as much a +n.+as 结构 或者说是 as much as 结构一种变体。

（as much a +名词+as 类似于as +adj+a+名词+as)

She is as clever a student as you (are) 

就是她和你一样都是聪明的学生.(as clever a student as=as much a creature as 结构）

She is as kind a girl as you (are)

Jack is as tall a boy as Mike(is)

Jack is as much a fool as Mike (is)

(以上句子结构，特别要注意不定冠词的位置：“在修饰词之后名词之前。”

主句谓语也使用倒装结构，正常语序为：all other animals on the earth are.

把以上原句子还原后为：

A:the ant is a creature

连词：as much as 

B:all other animals on earth are creatures.

(as much as 这里是表示程度：意思与...一样；还可以表示数量：意思为“多达”）

像以上类似结构还有

(2)as many as多达…(表示“数目”上的比较)

The difference between his income and mine can be as much as 1,000 yuan at least.

我和他的收入差额至少是1, 000元。

(2)as far as远至(到)…

They walked as far as the sea-shore.

他们步行远到海边。

(3)as long as

A:长达…

They have waited for me for as long as three hours.

他们等我长达3小时

You may stay here as long as you like.  

你高兴在这儿待多久就待多久.

They all continued their regard for me as long as they lived. 

他们毕生都在关心着我.

B:与...一样长

The rope is as long as that one.

这条绳子和那条绳子一样长

This line is four times as long as that one.
这条线是那条线的四倍长。

B:只要

He came in with a face as long as a fiddle and said it was raining again.
他拉长着脸进来说，又下雨了。

I don't mind as long as it doesn't rain.
只要不下雨就行了。

As long as you drive carefully, you will be very safe.
如果你开车小心，你就会很安全。

I'm not particular how you do it as long as it gets done.
只要把它完成了，你怎么做我并不计较。

As long as live, I will help you.
只要我活着，我都会帮助你。

We'll ship the goods at an early time as long as there is a steamer.
只要有船，我们就尽早装货。

As long as you don't betray me, I'll do whatever you ask me to (do).
只要你不出卖我，要我做什么我都愿意。