Masaya sa silid-aralan kapag magalang ang lahat.

It is joyful in the classroom when everyone is polite.

Breakdown of Masaya sa silid-aralan kapag magalang ang lahat.

• masaya: happy
• kapag: when
• sa: in
• magalang: polite
• silid-aralan: the classroom

Questions & Answers about Masaya sa silid-aralan kapag magalang ang lahat.

Why does the sentence begin with Masaya instead of saying Ang silid-aralan ay masaya?

Filipino often fronts the predicate (here, the adjective masaya) before the subject or circumstantial phrase. The pattern for a stative description is:
  Predicate + Circumstantial phrase (location, time, etc.) + (optional) Subject.
“Masaya sa silid-aralan” essentially means “It is happy/fun in the classroom.” You could say the more formal Ang silid-aralan ay masaya, but native speakers usually put the adjective first for brevity and flow.

What role does sa silid-aralan play in this sentence?

Sa silid-aralan is a circumstantial phrase marked by the preposition sa, indicating location (“in the classroom”). It answers the question “Where is it happy?” It is not the subject; it simply tells you where the state of being masaya takes place.

Why is there no word for “is” in Masaya sa silid-aralan kapag magalang ang lahat?

In Tagalog, stative predicates (adjectives, vehicles of embodiment) do not need a separate copula (“is”). The adjective masaya itself serves as the predicate. In other contexts or in very formal/archaic Tagalog you might see ay, but in everyday speech it’s omitted.

What is the function of kapag and how is it different from kung?

Kapag means “when” in the sense of a general or repeated condition (e.g., “whenever everyone is polite”).
By contrast, kung often introduces a single or hypothetical condition (“if”).
Here, kapag magalang ang lahat conveys that the classroom is always happy whenever everyone behaves politely.

Why does it say magalang ang lahat instead of lahat ay magalang or ang lahat ay magalang?

Tagalog allows predicate-fronting even in subordinate clauses: Predicate + Subject.

• magalang (predicate/adjective)
• ang lahat (subject, marked by ang)
  You could insert ay for a more formal tone: kapag ang lahat ay magalang, but native speakers drop it in casual speech.

What part of speech is magalang here—an adjective or a verb?

In this context, magalang is used as an adjective meaning “polite.” Although mag- is a verb-forming prefix in Tagalog, when paired with abstract roots like galang (respect), it functions adjectivally to describe a person’s demeanor.

Why do we use ang lahat? Could we just say lahat?

Lahat by itself means “all” or “everyone,” but in a clause it needs a marker to show its grammatical role. Ang marks it as the topic/subject. Without ang, the sentence would sound incomplete or ambiguous about who is doing the politeness.

I’ve seen silid-aralan written without a hyphen. Is the hyphen mandatory?

The hyphen in silid-aralan simply highlights that it’s a compound of silid (“room”) + aralan (“place of study”). Modern usage often omits the hyphen (silidaralan) without changing the meaning, though some style guides still recommend it to improve readability.