In learningTagalog grammar, one of the key components to master is the proper usage of verbs in the past tense, which is a bit different from English. Tagalog verbs are inflected for time by changing the form of the verb. An aspect marker, such as ‘ng’ or ‘um’, is often used to indicate the verb’s past tense. Here we will look at past tense usage in Tagalog, which is referred to as “Nag” or “Nagsi” for many actions.