Mfuko wangu ni tupu.

• mfuko = bag, sack, or sometimes pocket, depending on context
• wangu = my
• ni = is / am / are
• tupu = empty

So the structure is basically:

mfuko + wangu + ni + tupu
bag/pocket + my + is + empty

Because mfuko belongs to a noun class that requires the possessive form wangu in the singular.

In Swahili, possessives change to agree with the noun they describe. So you do not use one single word for my in every situation.

Examples:

• mfuko wangu = my bag/pocket
• mti wangu = my tree
• kitabu changu = my book
• nyumba yangu = my house

For mfuko, the correct form is wangu.

Mfuko is singular in the m-/mi- noun class, often called class 3/4:

• singular: mfuko
• plural: mifuko

This matters because other words in the sentence may need to agree with that noun class, especially possessives and sometimes adjectives.

That is why you get:

• mfuko wangu = my bag
• mifuko yangu = my bags

So learning the noun class helps you predict the forms of related words.

Ni is the copula, the word used for to be in simple present statements like is, am, or are.

So in:

• Mfuko wangu ni tupu

ni connects my bag/pocket with empty.

It works like:

• A is B

Other examples:

• Huyu ni mwalimu. = This is a teacher.
• Chai ni tamu. = Tea is sweet.

In Swahili, possessives usually come after the noun.

So:

• mfuko wangu = literally bag my
• kitabu changu = literally book my
• rafiki yangu = literally friend my

This is normal Swahili word order:

• noun + possessive

It can mean more than one thing depending on context. Common meanings include:

• bag
• sack
• pocket

So Mfuko wangu ni tupu could mean:

• My bag is empty
• My pocket is empty

Context tells you which one is meant.

Swahili normally does not use articles like English a, an, and the.

So a noun like mfuko can mean:

• a bag
• the bag
• just bag

The exact meaning depends on context.

That is why Mfuko wangu ni tupu does not need a separate word for the or a.

This is a very common question.

In the sentence as given, tupu is used as the predicate adjective after ni:

• Mfuko wangu ni tupu.

You may also meet an agreeing form when the adjective is placed directly with the noun:

• mfuko mtupu = an empty bag
• mifuko mitupu = empty bags

So a learner may see both patterns:

• mfuko wangu ni tupu
• mfuko mtupu

Both are useful to know. The sentence you were given is a very natural way to say that the bag or pocket is empty.

Change the noun to its plural and also change the possessive:

• singular: Mfuko wangu ni tupu.
• plural: Mifuko yangu ni tupu.

So:

• mfuko → mifuko
• wangu → yangu

This gives:

• Mifuko yangu ni tupu. = My bags are empty.

You may also see the agreeing adjective in other constructions, such as mifuko mitupu for empty bags.

A simple learner-friendly pronunciation guide is:

m-FOO-koh WAHN-goo nee TOO-poo

A few notes:

• mf at the start of mfuko is pronounced together; the m is short
• wangu has a w sound, not a hard English v
• ni is just nee
• tupu has two clear u vowels: too-poo

Swahili pronunciation is usually quite regular, so once you know the sounds, it is very consistent.

A simple way is:

Mfuko wangu si tupu.

Here, si is the negative form of ni in this kind of sentence.

So:

• ni tupu = is empty
• si tupu = is not empty

Yes.

• mfuko mtupu = an empty bag / an empty pocket
• mfuko wangu ni tupu = my bag/pocket is empty

The difference is mainly grammatical:

• mfuko mtupu is a noun phrase: it describes the noun directly
• mfuko wangu ni tupu is a full sentence: it makes a statement

Compare:

• Ninaona mfuko mtupu. = I see an empty bag.
• Mfuko wangu ni tupu. = My bag is empty.

No. For past tense, you would usually use -kuwa (to be) with the correct subject agreement.

For example:

• Mfuko wangu ulikuwa tupu. = My bag was empty.

Here:

• uli- agrees with mfuko
• -kuwa gives the idea of was

So:

• present: Mfuko wangu ni tupu.
• past: Mfuko wangu ulikuwa tupu.