
1 With how (rather formal)
| 
			 how + adjective  | 
		
Strawberries! How nice!
| 
			 How + adjective/adverb + subject + verb  | 
		
How cold it is! (NOT –How it is cold!)
How beautifully you sing! (NOT –How you sing beautifully!)
| 
			 how + subject + verb  | 
		
How you’ve grown!
2 With what
| 
			 what a/an (+ adjective) + singular countable noun  | 
		
What a rude man! (NOT –What rude man!)
What a nice dress! (NOT –What nice dress!)
What a surprise!
| 
			 What (+ adjective) + uncountable/plural noun  | 
		
What beautiful weather! (NOT –What a beautiful weather! (NOT What a beautiful weather!)
What lovely flowers!
3 Negative questions
Isn’t the weather nice!
Hasn’t she grown!
In American English, ordinary (non-negative) question forms are often used in exclamations.
Am I hungry! Did she make a mistake!