What are the differences between alegrar y alegrarse?
A ver los regalos, los niños se pusieron muy alegres/ alegrarse. My book says alegres is correct, but I wonder why alegrarse is wrong?
2 Answers
Nihao. "Se" as you probably know is a relexsive pronoum. When you attach it to a verb it means that someone is performing the action on or for themselves. "Lavar" is to wash. "Lavarse" is to wash oneself. "Alegrar" means to make happy or to rejoice. "Alegrarse" means to make yourself happy or to be happy.
Because alegres here is an adjective!, not a verb.