bangohan no ato, haha ga otya wo irete kuremasita.

In 晩ご飯のあと, the の links 晩ご飯 (dinner) with あと (after).

So:

• 晩ご飯 = dinner
• あと = after
• 晩ご飯のあと = after dinner

This use of の is very common when one noun modifies another noun.

Examples:

• 学校のあと = after school
• 仕事のあと = after work

あと is a noun meaning after or the time after. In Japanese, time expressions are often built with nouns.

So 晩ご飯のあと literally means something like the after of dinner, which naturally becomes after dinner in English.

You may sometimes see:

• 晩ご飯のあとで

The で adds a slight sense of at that time / then, but 晩ご飯のあと by itself is already perfectly natural.

が marks 母 as the subject of the action.

Here:

• 母が = mother is the one who did it
• お茶を入れてくれました = made/poured tea for me

So 母が tells us who performed the action.

A learner may wonder why not 母は. Using は would present mother as the topic, often with a contrastive or topic-setting nuance. But in this sentence, が simply identifies the person who did the action.

In Japanese, when speaking about your own family to someone else, you usually use the plain family term:

• 母 = my mother
• 父 = my father

Using お母さん usually sounds like:

• addressing your mother directly, or
• referring to someone else’s mother more politely

So in this sentence, 母 is the normal choice for my mother.

The お in お茶 is an honorific/polite prefix. It is very common with some everyday words, and お茶 is the standard form for tea.

While 茶 exists as a word, in ordinary speech people usually say お茶.

This お does not necessarily make the sentence extremely formal; it is just the natural way to say the word.

Other common examples:

• お水 = water
• お金 = money
• お菓子 = sweets

を marks the direct object of the verb.

Here, お茶を means tea is the thing being made/prepared/poured.

So:

• 母が = mother
• お茶を = tea
• 入れてくれました = made/prepared it for me

Yes, 入れる basically means to put in, but with drinks it often means to make, to pour, or to prepare.

So お茶を入れる is a set phrase that means:

• to make tea
• to prepare tea
• to pour tea

It does not mean only physically putting tea into something in a literal word-for-word way. In this context, it refers naturally to preparing tea.

入れて is the て-form of 入れる. It connects to くれました.

The full structure is:

• 入れてくれました

This means:

• did the action of making/pouring tea for me/us

So it is not:

• 母がお茶を入れました。 = Mother made tea. but rather:
• 母がお茶を入れてくれました。 = Mother kindly made tea for me/us.

The て-form + くれる pattern is very important in Japanese.

くれました shows that someone did something for the speaker or for someone in the speaker’s in-group, and that the action is viewed as a favor or kindness.

So:

• 母がお茶を入れました。 = Mother made tea.
• 母がお茶を入れてくれました。 = Mother made tea for me/us.

The second sentence has a nuance of receiving that action appreciatively.

This is one of the key points in the sentence.

Usually, 〜てくれました implies the action was done for me or for someone closely connected to me.

Without more context, the most natural interpretation is:

• Mother made tea for me/us

If the action were for someone else outside the speaker’s group, Japanese would more naturally use a different pattern, such as 〜てあげました or just a plain verb depending on the situation.

Because the sentence describes a completed action in the past:

• 入れてくれました = made/poured tea for me

Even if English might sometimes say Mother made tea after dinner, Japanese uses the past polite form because the action already happened.

Yes, it is polite because it ends with くれました, which is the polite past form.

But the sentence is not extremely formal. It is normal polite Japanese.

You can compare:

• casual: 晩ご飯のあと、母がお茶を入れてくれた。
• polite: 晩ご飯のあと、母がお茶を入れてくれました。

No, normal Japanese is usually written without spaces.

The standard writing would be:

晩ご飯のあと、母がお茶を入れてくれました。

Spaces are often added in learning materials to make it easier to see word boundaries.

They all can mean dinner/evening meal, but the nuance differs a bit:

• 晩ご飯 = very common, everyday, warm feeling
• 夕飯 = also common and casual
• 夕食 = a bit more formal or neutral

In this sentence, 晩ご飯 sounds very natural and homey.

A useful breakdown is:

[time expression] + [subject] + [object] + [verb て-form + くれる]

So here:

• 晩ご飯のあと = after dinner
• 母が = mother
• お茶を = tea
• 入れてくれました = made/prepared for me

This pattern is very common:

• 友だちが宿題を手伝ってくれました。
  • My friend helped me with my homework.
• 姉がケーキを作ってくれました。
  • My older sister made a cake for me.