GRAMMAR.- Exclamations

Exclamations are often constructed with how and what or with so and such. Negative question forms are also common.

Exclamations with how

Form: how + adjective/adverb + subject + verb
How cold it is! (NOT How it is cold!)
How beautifully she sings!

The structure how + subject + verb is also possible.
How you have grown!

Exclamations with what

Form: what a/an (+ adjective) + singular countable noun
What a lovely song! (NOT What lovely song!)
What a surprise! (NOT What surprise!)

We use what + adjective before an uncountable or plural noun.
What lovely flowers! (NOT What a lovely flowers!)
What fools! (NOT What a fools!)
What beautiful weather! (NOT What a beautiful weather!)

What + object + subject + verb
What a beautiful smile you have! (NOT What a beautiful smile have you!)

Exclamations with So and Such

Different structures are possible.

Form: so + adjective
You are so sweet!

Form: such a/an (+ adjective) + singular countable noun
He is such a nice boy!

Form: such (+ adjective) + uncountable/plural noun
They are such kind people!
They talk such rubbish!