If there is a single consonant between two vowels after adding a prefix or suffix, double it. The tense, mood, and persons of a verb are indicated in a string of suffixes, as follows.
Intransitive verbs are rare.
Most of them have been changed to include the reflexive person instead. Includes the speaker and the listener, possibly others depending on the context. These parts of the verb indicate which noun performs which function. In general, adjectives and adverbs are placed closest to the word they modify to prevent confusion, usually before. Very typical in words that would otherwise be intransitive, since intransitive verbs have become rare.