När barnet blev rädd, ropade det efter sin mamma.

Because Swedish main clauses follow the V2 rule: the finite verb normally comes in the second position.

Here, the sentence begins with the subordinate clause När barnet blev rädd. After that, the main clause starts, and its finite verb ropade must come first in the main clause:

• När barnet blev rädd, ropade det efter sin mamma.

If you remove the opening clause, the more basic word order is:

• Barnet ropade efter sin mamma.

So the word order changes because something else comes before the main clause.

It is the subject.

This can look strange to English speakers because English usually keeps subject + verb order, but Swedish changes the order after an opening element. So in:

• När barnet blev rädd, ropade det efter sin mamma

the main clause is really:

• det ropade efter sin mamma

with inversion caused by the opening clause.

So det means the child / it, not it as an object.

Because barnet is the definite singular form of ett barn.

• ett barn = a child
• barnet = the child

Swedish usually marks definiteness by adding an ending to the noun, instead of using a separate word like the.

Because barn is a grammatically neuter noun, an ett-word:

• ett barn
• barnet
• pronoun: det

So det agrees with the grammatical gender of barn.

In real-life Swedish, if the child’s gender is known or relevant, speakers may also use han, hon, or hen. But in neutral narration and grammar examples, det is very common after barnet.

Because blev rädd means became/got scared, while var rädd means was scared.

So there is an important difference:

• Barnet blev rädd = the child got scared
• Barnet var rädd = the child was scared

In this sentence, the idea is that the child first became frightened, and then called for its mother.

Because rädd is a predicative adjective here, used after blev.

Some Swedish adjectives change in the neuter, but rädd stays rädd in the singular:

• Han blev rädd
• Hon blev rädd
• Barnet blev rädd

So even though barnet is an ett-word, rädd is still the correct form here.

Because sin is the reflexive possessive. It refers back to the subject of the clause.

Here, the subject is det (= the child), so:

• sin mamma = its own mother

If you used hans or hennes, it would sound like you were talking about someone else’s mother, not the subject’s own mother.

So Swedish uses sin/sitt/sina when the possessor is the subject of the clause.

Because sin/sitt/sina agrees with the thing being possessed, not with the owner.

Here, the possessed noun is mamma, which is an en-word singular noun. So the correct form is:

• sin mamma

Compare:

• sin mamma = his/her/its own mother
• sitt barn = his/her/its own child
• sina saker = his/her/its own things

So even though the subject is det, the possessive form is chosen from mamma, not from the subject.

Here ropa efter means something like call for, cry out for, or call after someone.

So ropade efter sin mamma means the child called out because it wanted its mother.

This is not just the basic verb ropa by itself. The combination ropa efter has its own natural meaning.

Because ropa efter is a normal Swedish verb + preposition combination.

A lot of Swedish verbs take specific prepositions that do not match English exactly. So even if English says call for, Swedish says ropa efter here.

This is something learners usually need to memorize as a chunk:

• ropa efter någon = call for someone / call out for someone

När introduces a subordinate clause and means when.

• När barnet blev rädd = When the child got scared

It sets the time/background for the main action.

A learner may want to compare it with om, but om means if, not when. So när is the correct choice here because the sentence talks about something that actually happened.

Not always. In modern Swedish, the comma here is often optional.

So both of these are possible:

• När barnet blev rädd, ropade det efter sin mamma.
• När barnet blev rädd ropade det efter sin mamma.

Many writers include the comma to make the sentence easier to read, especially when the opening clause is a bit longer.