She has too mild a nature to get angry.

请问老师以上句子是什么语法结构？尤其是粗体字部分。

请重点分析一下: Too… to (太…而不能…） 和冠词的位置!

解答如下：

你的问题主要涉及“不定冠词位置的处理问题”主要从以下2个方面进行处理就可以啦。

不定冠词用于固定结构quite/half/rather/many/what/such a (an)+名词或so/too/how+形容词+a(an)+名词中，表示程度、数量或感叹等.

(1):quite/half/rather/many/what/such a (an)+名词

It takes half an hour to get there. 到那里需要半小时。

He's quite a famous artist. 他是个很有名的艺术家。

Many a man would welcome such an opportunity.

许多人会很高兴有这样一个机会。

What a fool he is! 他多傻啊！

It's too difficult a problem for him.对他来说，这是一个太难的问题。

I have a number of sponsored students.

Mary has a lot of money.

Tom is rather a fool.

I think Chinese is quite a useful language.

Many a student has asked that question.

The visitor left half an hour ago.

What a fine day it is!

How can you say such a thing?

(2):so/too/how+形容词+a(an)+名词

We have not had so hot a day before.

Susan is as clever a girl as Anna.

That is too difficult a book for beginners.

No one knew how serious a problem it was until later.