Jag måste bära min väska själv idag.

After modal verbs in Swedish, you normally use the infinitive without att.

So:

• Jag måste bära ... = I must carry ...
• Jag kan bära ... = I can carry ...
• Jag vill bära ... = I want to carry ...

This is similar to English, where you say must carry, not must to carry.

Måste means must or have to.

In everyday Swedish, måste is very common for both strong obligation and practical necessity. In this sentence, it most likely means something like:

• I have to carry my bag myself today
• I must carry my bag myself today

So it does not necessarily sound dramatic; it can simply describe a situation.

Swedish possessives change depending on the gender and number of the noun.

• min = for singular en-words
• mitt = for singular ett-words
• mina = for plural nouns

Since väska is an en-word (en väska), the correct form is min väska.

Examples:

• min bok = my book
• min väska = my bag
• mitt hus = my house
• mina skor = my shoes

In Swedish, a possessive usually replaces the article.

So you say:

• min väska = my bag

not:

• en min väska

This works much like English: you say my bag, not a my bag.

Bära is the infinitive form of the verb, meaning to carry.

Its principal forms are:

• att bära = to carry
• bär = carry / carries
• bar = carried
• burit = carried

In this sentence, it stays in the infinitive because it comes after måste:

• Jag måste bära = I must carry

Själv here means myself in the sense of personally, on my own, or without help.

So Jag måste bära min väska själv idag means that I am the one who has to carry it, rather than someone else helping me.

It is not exactly the same as reflexive myself in English grammar; it is more about emphasis and independence.

Compare:

• Jag gjorde det själv. = I did it myself.
• Hon åkte själv. = She went by herself.

Själv changes form depending on the person/number it refers to.

Common forms include:

• själv = singular common gender / natural gender singular in many contexts
• självt = neuter singular
• själva = plural, or sometimes used in certain fixed expressions

Here it refers to jag, which is singular, so själv is correct:

• Jag måste bära min väska själv.

You would use själva with a plural subject:

• Vi måste bära våra väskor själva. = We have to carry our bags ourselves.

In this sentence, själv comes after the object:

• Jag måste bära min väska själv idag.

That sounds natural and clear.

You can sometimes move själv for emphasis:

• Jag måste själv bära min väska idag.

This puts extra emphasis on I myself.

So both are possible, but the nuance changes a little:

• ... bära min väska själv = carry my bag without help / by myself
• ... själv bära min väska = I myself have to carry it

Swedish often puts time expressions such as idag at the end of the sentence, especially in neutral word order.

So:

• Jag måste bära min väska själv idag.

is very natural.

But idag can also be moved to the front:

• Idag måste jag bära min väska själv.

That gives a little more focus to today.

Both are correct; the choice depends on what you want to emphasize.

Swedish is a V2 language, which means the finite verb usually comes in the second position in main clauses.

So if you move something else to the front, the verb must still stay second:

• Jag måste bära min väska själv idag.
• Idag måste jag bära min väska själv.

Not:

• Idag jag måste ...

This is a very important Swedish word-order rule.

Väska is a general word for bag. Depending on context, it can mean:

• handbag
• purse
• bag
• satchel

If you want to be more specific, Swedish has other words too, such as:

• handväska = handbag
• ryggsäck = backpack

So min väska is understood broadly as my bag.

Usually, no—not if you want the same meaning.

• själv = myself / by myself / personally
• ensam = alone

In this sentence, själv means that I have to carry the bag without help or personally.

If you said ensam, it would focus more on being alone, which is a different idea.

Compare:

• Jag måste bära min väska själv. = I have to carry my bag myself.
• Jag är ensam idag. = I am alone today.

Sometimes, but the meaning changes a bit.

• måste = must / have to
• behöver = need to

So:

• Jag måste bära min väska själv idag. = I have to carry my bag myself today.
• Jag behöver bära min väska själv idag. = I need to carry my bag myself today.

Måste sounds stronger and more like obligation or necessity. Behöver sounds more like need.

In many situations, måste is the more natural choice here.

A rough English-friendly guide:

• bära ≈ BEH-ra, with an ä sound similar to the e in bed
• väska ≈ VES-ka, again with ä like e in bed

A few notes:

• ä is not like English a in day
• r in Swedish is usually lighter than in many English accents
• the sk in väska is pronounced like a normal sk sound here

So the whole sentence is roughly:

• Yah musteh BEH-ra meen VES-ka shélv ee-dahg

That is only approximate, but it can help at the beginning.