so vs. such & how vs. what

so vs. such & how vs. what
在佳音翰林版Book 6 Unit 2，
有下列的句子可以明確比較so及such，以及how及what的感嘆句的不同。
so...that vs. such...that
Kissing a shark is so difficult that we won't even have a slim chance of doing it.
(so強調difficult)
You're such a lazy person that you won't be able to keep your long hair clean and tidy.  
(such強調a lazy person)

同樣地，在感嘆句裡。
How boring that idea is! 
(How強調boring)
What an amazing book it is!
(What強調an amazing book)

因此so/how及such/what的用法有其類似之處。
由例句了解，更能看出語言表達的巧妙之處。