These verbs and their reflexive forms?
Imaginar
"No puedes imaginar cuánto he deseado que llegara este momento."
"No te puedes imaginar lo mal que iba todo."
Inventar
This site doesn't provide much examples for this word but the page I found seems to imply that the meaning is identical with using both "inventar" and "inventarse" (according to this page: http://www.spanishdict.com/translate/inventar).
I just want to know the difference between the reflexive and regular verb forms, if there is any.
2 Answers
Don't confuse Pronomial and Reflexive verb forms. Reflexive verb forms are a small subset of pronomial verbs. Reflexive verbs require that the action of the verb reflects back onto the subject. Pronomial verbs have much broader usages. Sometimes, but not always, completely changing the meaning of the verb. For example: Ir vs Irse. But sometimes only providing emphasis. For example: Comer vs Comerse.
I am not a native speaker.
¿Cuándo se inventó el teléfono? means "When was the telephone invented?"
¿Quién inventó el teléfono? means "Who invented the telephone?"
Do you see the difference between inventar and inventarse?