asagohan no yooguruto ha supuun de tabemasu.

They are just there to help learners see the parts of the sentence.

In normal Japanese writing, you would usually write it without spaces:

朝ご飯のヨーグルトはスプーンで食べます。

Japanese does not normally separate words with spaces the way English does.

Here, の connects two nouns.

• 朝ご飯 = breakfast
• ヨーグルト = yogurt
• 朝ご飯のヨーグルト = the yogurt for breakfast / the breakfast yogurt / the yogurt at breakfast

So の is showing a relationship between the two nouns. In this sentence, it most likely means the yogurt that is part of breakfast.

It does not necessarily mean ownership, even though の is often first taught as 's. It can show many kinds of connections:

• possession
• category
• location
• time-related connection
• part of a set

は marks the topic of the sentence.

So 朝ご飯のヨーグルトは means something like:

As for the yogurt at breakfast, ...

This does not automatically mean it is the grammatical subject. It just means that this is what the sentence is talking about.

Japanese often sets up a topic first, and then says something about it.

That is a very common question.

With 食べます, learners often expect:

ヨーグルトを食べます = eat yogurt

And that is correct.

But in your sentence, ヨーグルト has been made the topic, so は is used instead of を:

• basic idea: 朝ご飯のヨーグルトを食べます
• topicalized version: 朝ご飯のヨーグルトは食べます

So the yogurt is still the thing being eaten, but the sentence is presenting it as the topic.

A rough English feeling is:

• ヨーグルトを食べます = I eat yogurt.
• ヨーグルトは食べます = As for yogurt, I do eat it.

Here, で marks the tool or means used to do the action.

So:

• スプーンで = with a spoon / using a spoon

This is a very common use of で.

Examples:

• はしで食べます = eat with chopsticks
• ペンで書きます = write with a pen
• バスで行きます = go by bus

So in this sentence, で does not mean location. It means using a spoon as the instrument.

Because that would mean eat the spoon, which is obviously not the intended meaning.

The particle を marks the direct object, the thing directly affected by the verb.

Compare:

• ヨーグルトを食べます = eat the yogurt
• スプーンで食べます = eat with a spoon

So:

• を = the thing you eat
• で = the tool you use to eat it

Japanese often leaves out the subject when it is clear from context.

So this sentence does not explicitly say I, you, we, or they.

Depending on context, it could mean:

• I eat it with a spoon
• We eat it with a spoon
• You eat it with a spoon
• or even a general statement like People eat it with a spoon

In an isolated textbook sentence, English speakers often default to I when imagining the meaning, but the Japanese itself does not force that.

食べます is the polite non-past form.

In Japanese, the non-past can mean:

• present / habitual action
• future action

So depending on context, it could mean:

• (I) eat it with a spoon
• (I) will eat it with a spoon

In this kind of simple example sentence, it usually sounds like a habitual or general statement.

Normally, yogurt is treated as something you eat, so 食べます is natural.

Japanese usually uses:

• ヨーグルトを食べます = eat yogurt

If it is specifically drinkable yogurt, then 飲みます can be used:

• 飲むヨーグルトを飲みます = drink drinkable yogurt

So for ordinary yogurt in a bowl or cup, 食べます is the expected verb.

It is understandable and grammatically fine, but the exact naturalness depends on what you want to emphasize.

朝ご飯のヨーグルトは sounds like the yogurt that is part of breakfast. That works well if you are talking about breakfast items and saying how each one is eaten.

For example, the nuance could be:

• As for the yogurt at breakfast, we eat it with a spoon.

If you simply want to say I eat yogurt for breakfast with a spoon, other phrasings may sound more natural depending on context, such as:

• 朝ご飯にヨーグルトを食べます。
• 朝ご飯ではヨーグルトを食べます。
• 朝ご飯のとき、ヨーグルトはスプーンで食べます。

These are slightly different in nuance, but they may match the intended meaning more directly.

So the given sentence is not wrong; it just has a specific topic/comment feel.

A simple breakdown is:

• 朝ご飯のヨーグルトは = as for the yogurt at breakfast
• スプーンで = with a spoon
• 食べます = eat

So the pattern is:

[topic] は [tool/means] で [verb]

This is a very useful pattern in Japanese.

Examples:

• パンは手で食べます。 = As for bread, I eat it with my hands.
• スープはスプーンで飲みます。 = As for soup, I have it with a spoon.
• 魚ははしで食べます。 = As for fish, I eat it with chopsticks.