My textbook makes a difference between verbs that describe activities and verbs that describe changes. Two examples given are:
話す - activity
結婚する - change
It then goes on to say that 話している describes an action in progress while 結婚している describes the result of a change (being married). Then it goes on that ている after transitive verbs describe actions in progress, and ている after intransitive verbs describe states that hold after the change takes place.
It's clear to me that 結婚する is a change verb, but I'm not sure if 結婚する is transitive or intransitive. All the dictionaries I've checked don't list 結婚する, just 結婚. But, in any case, do intransitive-change verbs always coincide? Or are there transitive-change verbs?
Also, how can I distinguish an action verb from a change verb? It's not always as obvious as with 結婚する. Is there any reference or dictionary that tells you which are which? Or any method you guys use to know which is which?