英语中怎么改感叹句啊?!讲详细点!

what后接名词
how后接形容词
感叹句一般是用来表示说话时的喜悦、惊讶等情感.英语感叹句常用"what"和"how"引导,"what"和"how"与所修饰的词置于句首,其它部分用陈述句语序.
一、 由"what"引导的感叹句："what"意为"多么"用作定语,修饰名词（被强调部分）,单数可数名词前要加不定冠词a/an,复数可数名词或不可数名词前不用冠词.这类句子的结构形式是：
what+(a/an)+adj.+n.+主语+谓语+(it is).
如：
① What a clever girl she is!
多么聪明的姑娘呀!
② What an interesting story it is!
多么有趣的故事呀!
③ What good children they are!
他们是多么好的孩子呀!
④ What beautiful flowers they are!
多么漂亮的花呀!
⑤ What delicious food it is!
多么有味的食物呀!
⑥ What heavy snow it is!
多么大的雪呀!
二、由"how"引导的感叹句："how"意为"多么",用作状语,修饰形容词或副词（被强调部分）.如果修饰形容词,则句中的谓语动词用系动词；如果how修饰副词,则句中的谓语动词用行为动词,这类句子的结构形式是：
How+adj.（adv.）+主语+谓语+(it is).
如：① How cold it is today!
今天多么冷呀!
② How nice the pictures are!
多么漂亮的图画呀!
③ How happy they look!
他们显得多么高兴呀!
④ How well she sings!
她唱得多好呀!
⑤ How hard they are working now!
他们干得多么起劲呀!
三、在表示同一意义时,英语感叹既可用"what"引导,也可用"how"引导.如：
① What a hot day it is!
How hot the day is !
多么热的天气呀!
② What tall buildings they are!
How tall the buildings are!
多么高的楼房呀!
③ What bad weather it is!
How bad the weather is!
多么糟糕的天气呀!
④ What bright sunshine it is!
How bright the sunshine is!
多么明亮的阳光呀!
四、感叹句在表示激动强烈的感情时,口语中常常采用省略句,其后面的主语和谓语往往略去不讲.
如：① What a fine day!
多么晴朗的天呀!
② What an honest boy!
多么诚实的孩子呀!
③ What red apples!
多么红的苹果呀!
④ How cool!
好凉快呀!
⑤ How wonderful!
精彩极了!
由what,how引导的感叹句的构成形式、用法及区别
感叹句是表示喜、怒、哀、乐以及惊异等感情的句子.句末用感叹号“!”,读时用降调,感叹句往往由what或how引导,what修饰名词,how修饰形容词,副词或动词.
1.what引导的感叹句：
（1）what + a/an +形容词+单数可数名词+陈述句（主语+谓语）
 What a beautiful city it is!
 What an interesting story she told!
（2）what+形容词+复数可数名词/不可数名词+陈述句（主语+谓语）
 What expensive watches they are!
 What terrible weather it is!
2．How引导的感叹句：
（1）How+形容词/副词+陈述句（主语+谓语）
 How cold it is!
 How hard he works!
（2）How+陈述句（主语+谓语）
 How he loves his son!
 How I miss you!
（3）How+形容词+a/an+单数可数名词+陈述句（主语+谓语）
 How tall a tree it is!
（4）上述两种感叹句可以互相转换.例如：
What a clever boy he is!→How clever the boy is!
What a cold day it is!→How cold it is!

What a nice cat. How nice the cat is.(看看名词和be动词的位置)

what a nice weekend i have
how nice the weekend is

He is happy to see his father.(改感叹句)
She is playing in the water happily.(同上 )
The old man is very kind .(用what感叹)
How happy he is to see his father
How happily she is playing in the wather
What a kind old man he is

使用how和what 作为句首词的陈述句
例如。It is a beautiful day today----what a beautiful day today!
----how beautiful day it is!
陈述句就这两种修改类型，套用就行