Verb Sequence in Finite Verb Phrases-1

Simple English finite verb phrases (helping verbs and a main verb) may seem a little complicated, but they have a clear structure. Four kinds of verbs can appear before the main verb (#2~#5):

#1
Simple English finite verb phrases only have one tense, and the tense always goes on the very first verb in the verb phrase. If #2~5 are missing, the tense goes directly on the main verb:

PAst tense: Henry walked to school yesterday

#2
The first kind of verb that can appear in the verb phrase is a modal verb. "Modal" is the adjective form of the word "mood." Your mood is how you feel, so a modal verb shows your attitude or how you feel about the main verb:

Henry can walk quickly (can = this is my opinion about his ability)

#3
Perfective is a slightly complicated word that means something is (now) possible/necessary etc. because of another thing that happened (before now).

Henry has walked 10 kilometers every day for the past two years (so he has strong legs and he probably needs new shoes!)

#4
Progressive means that something is/was happening now.then.

Henry is walking home/Henry was walking home

#5
In English, we often emphasize a word (emphasize = make it important) by putting it at or near the end of a sentence. Passive is a tool to
(1) move the subject of an active sentence to the end (this makes it sound  important).
(2) omit the subject (because we don't know, don't need to or don't want to talk about it)

Active: Henry made this table out of an old box (the word box is most important)
Passive: This table was made by Henry (The word Henry is now important)
Passive: This table was made by Henry out of an old box (The word Henry has been omitted)