How and what are used in exclamations, how with an adjective or adverb alone, what with an adjective and a noun or a noun alone, e.g.:
Example |
Spanish |
|
Adjective |
How strange! |
¡Qué extraño! |
Adverb |
How fast they talk! |
¡Qué deprisa hablan! |
Singular countable noun |
What a strange coincidence! |
¡Qué coincidencia tan extraña! |
Plural countable noun |
What wonderful flowers! |
¡Qué flores tan maravillosas! |
Singular countable noun |
What an idiot! |
¡Qué imbécil! |
Uncountable noun |
What nonsense! |
¡Qué disparate! |