*Native Tagalog speakers, please correct me if this is not always the case or if there is an error. (- _ -)
The verbal affixes that indicate that the actor, doer, or the originator of the action is in focus are -um-, mag-, mang-, and ma-.
*Use ang family pronouns with actor focus verbs: Ako, Siya, Sila, Tayo, Kami, Kayo, Ka / Ikaw, Ito, Yan, Yon, Si, Sino
Examples:
(UM) verb
Inom (drink) = Root word
(UM)inom na ako ng gamot.
I already drank my medicine.
Kain (eat) = Root word
K(UM)ain ako ng tinapay.
I ate bread.
Apply same rule to basic/infinitive form.
P(UM)unta ka diyan (doon? roon?)!
You go there!
Verbal affixes that indicate that the subject of the sentence is the object or goal of the action include the suffixes -in and -an and the prefix i-.
*Use Ng Family pronous with object focus verbs: Ko, Nya, Nila, Natin, Namin, Mo, Nyo, Nito, Niyan, Niyon, Ni, Nina
Examples:
(IN) verb
K(IN)ain ko ang tinapay.
I ate the bread.
(IN)inom ni John ang tubig sa ref.
John drank the water in the refrigerator.