To indicate that something is increasing we can apply two structures: er and er / more and more.Para indicar que algo está aumentando, podemos aplicar dos estructuras: er y er / más y más.
a) …….er and …….er
To form this structure we have to add “er” to the adjective to form a comparative adjective. It is used with adjectives and short adverbs; such as, closer and closer, longer and longer.
Examples:
She is getting closer and closer of her mother.
Ella se está acercando cada vez más a su madre.
By the end of the twentieth century, couples were waiting longer and longer to marry.
b) more and more
We can use this structure with long adjectives or adverbs ; for example, more and more difficult, more and more slowly.
Double comparatives
Double comparatives describe a cause and effect process. Also, they are written as a sentence with a comma separating the cause and the effect. The structure to use them is the following:
Las comparaciones dobles describen un proceso de causa y efecto. Además, se escriben como una oración con una coma que separa la causa y el efecto.
[the + comparative form] + (subject) + (verb), [the + comparative form] + (subject) + (verb)]
Examples:
The more education women get, the later they marry.
Mientras más educación reciben las mujeres, más tarde se casan
The less children studied, the more slowly they learned.