Question

How beautiful these flowers are! (同义句转换）

Answer 1

What beautiful flowers they are!

由感叹词what引导的感叹句。
what修饰名词或名词短语，有以下两种形式：
　　1. What+a(an)+（形容词）+单数可数名词+主语+谓语！或是：What+名词词组+主语+谓语！如：
　　What an apple this is! What a fine day it is!
　　2. What+(形容词）+可数名词复数或不可数名词+主语+谓语！
　　What kind women they are! What nice music it is!

由How引导的感叹句。
　　how用来修饰形容词、副词或动词。其结构是：How+形容词（副词）+主语+谓语！
　　How hard the workers are working!
　　How clever the girl is!
　　How quickly the boy is writing!

Answer 2

What beautiful flowers they are!
感叹句可以由what和how来引导，句式如下：
What+a/an/---+名词（+主语+谓语）！
=How+形容词+名词+（主语+谓语）！
【注】：括号表示可以省略的内容
希望这些能对你有所帮助^-^

Answer 3

What beautiful flowers they are!

Answer 4

What beautiful flowers they are!