kyou ha suupaa de hamu wo katte, sandoitti wo tukurimasu.

When は is used as the topic particle, it is pronounced wa, not ha.
So 今日は is read きょう は.

This is a very common beginner point:

• は as part of a word: usually ha
• は as a particle: pronounced wa

In this sentence, 今日 is the topic, so は is the topic particle.

は marks the topic of the sentence. It sets up what the sentence is about.

So 今日は means something like:

• As for today, ...
• Today, ...

It does not simply mean subject in the same way English does. It introduces the context or topic for the rest of the sentence.

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

In English, you usually need to say I, he, she, and so on. In Japanese, if the speaker is obviously talking about themselves, the subject is often omitted.

So this sentence naturally implies something like:

• Today, I’ll buy ham at the supermarket and make sandwiches.

But the I does not need to be stated.

で marks the place where an action happens.

In this sentence:

• スーパーで = at the supermarket

The action happening there is 買って, from 買う meaning to buy.

So:

• スーパーでハムを買って = buy ham at the supermarket

A learner may wonder why it is not に. Here, で is used because the supermarket is the location of the action.

を marks the direct object of a verb, meaning the thing the action is done to.

Here there are two verbs, so there are two objects:

• ハムを買って = buy ham
• サンドイッチを作ります = make sandwiches

Each verb has its own object:

• ハム is what is bought
• サンドイッチ is what is made

So using を twice is completely natural.

買って is the te-form of 買う.

The te-form is often used to connect actions, especially when one action happens before another. In this sentence, it links:

• buy ham
• make sandwiches

So:

• ハムを買って、サンドイッチを作ります。 means
• Buy ham, and make sandwiches
• or more naturally, I’ll buy ham and make sandwiches

If you said 買います、作ります, it would sound less natural as a connected sentence.

Yes, in this sentence it strongly suggests that order.

The usual interpretation is:

1. Buy ham
2. Make sandwiches

The te-form often connects actions in sequence, especially when that order makes logical sense.

So the sentence feels like:

• Today, I’ll buy ham at the supermarket, then make sandwiches.

Japanese sentences usually end with the main verb, and that final verb carries the tense and politeness for the sentence.

Here, 作ります is the polite non-past form of 作る.

Non-past in Japanese can mean:

• present habitual
• future

In this sentence, it most naturally means a future action:

• I will make sandwiches

Because 作ります is the last verb, it finishes the whole sentence.

It can mean either, depending on context.

Japanese non-past forms often cover both present and future. In this sentence, because of 今日 and the sequence of actions, the meaning is most naturally:

• will make

So 作ります here is best understood as:

• I will make sandwiches

The comma helps show a pause between the two connected actions:

• buy ham
• make sandwiches

Japanese punctuation is often more flexible than English punctuation, so this comma is not always strictly required, but it is very common and makes the sentence easier to read.

It shows that 買って is a linking part, not the end of the sentence.

Katakana is commonly used for:

• loanwords from other languages
• some foreign names
• certain sound effects
• emphasis in some cases

These words are borrowed from foreign languages:

• スーパー = supermarket
• ハム = ham
• サンドイッチ = sandwich

That is why they are written in katakana rather than hiragana or kanji.

In this sentence, yes: 今日 is read きょう, meaning today.

Japanese kanji often have more than one reading, and 今日 is a famous example. Depending on the context, it can sometimes be read differently, but for the meaning today, きょう is the standard reading learners should know first.

So here:

• 今日は = きょうは = today / as for today

Yes. Japanese nouns usually do not change form for singular and plural.

So サンドイッチ can mean:

• a sandwich
• sandwiches

You understand the number from context rather than from the noun ending.

That means サンドイッチを作ります could mean:

• make a sandwich
• make sandwiches

Both are possible unless the context makes one more specific.