मेरा बैग काला है।

मेरा means my, but in Hindi it behaves more like an adjective than the English word my. It changes form to agree with the thing being possessed.

Here, बैग is treated as a masculine singular noun, so the correct form is मेरा.

Related forms are:

• मेरा = my, for masculine singular nouns
• मेरी = my, for feminine singular nouns
• मेरे = my, for masculine plural nouns

So:

• मेरा बैग = my bag
• मेरी किताब = my book
• मेरे जूते = my shoes

In Hindi, every noun has a grammatical gender, even if the object itself has no natural gender. Many borrowed English words also get assigned a gender in Hindi usage.

बैग is commonly treated as masculine, which is why you see:

• मेरा बैग
• काला बैग

If it were feminine, you would expect forms like मेरी and काली, but that is not standard for बैग.

काला means black, and it changes form to agree with the noun it describes.

Since बैग is masculine singular, the adjective takes the masculine singular form:

• काला = masculine singular
• काली = feminine singular
• काले = masculine plural

So:

• मेरा बैग काला है। = My bag is black.
• मेरी किताब काली है। = My book is black.
• मेरे जूते काले हैं। = My shoes are black.

है is the present-tense form of the verb to be for he/she/it/this/that and for singular statements like this one.

So in मेरा बैग काला है।, है means is.

Without है, the sentence would sound incomplete in standard Hindi when making a normal present-tense statement.

Compare:

• बैग काला है। = The bag is black.
• बैग काला था। = The bag was black.
• बैग काला होगा। = The bag will be black.

Hindi often follows a subject–object–verb pattern, and the verb usually comes at the end. In a sentence like this, the structure is roughly:

my bag black is

That is completely natural in Hindi:

• मेरा = my
• बैग = bag
• काला = black
• है = is

So even though English says My bag is black, Hindi puts है at the end: मेरा बैग काला है।

Yes. मेरा बैग means my bag, and that whole phrase functions as the subject.

Then काला is the description, and है links the subject with that description.

So the structure is:

• मेरा बैग = subject
• काला = predicate adjective / description
• है = is

Not with the same meaning.

• मेरा बैग काला है। means My bag is black.
• मेरा काला बैग है। sounds more like It is my black bag or I have my black bag, depending on context, and on its own it feels less complete or less natural as a simple color statement.

If you want to say the bag is black, keep काला after बैग and before है:

• मेरा बैग काला है।

If you want black bag as a noun phrase, then काला comes before बैग:

• मेरा काला बैग = my black bag

Yes. If the context already makes it clear whose bag you mean, you can say:

• बैग काला है। = The bag is black.

Adding मेरा makes it specific:

• मेरा बैग काला है। = My bag is black.

So मेरा is not required for grammar, but it is required if you want to express my.

Both the possessive and the adjective would change to match the feminine noun.

For example, with किताब (book), which is feminine:

• मेरी किताब काली है। = My book is black.

Notice the changes:

• मेरा → मेरी
• काला → काली

That is because किताब is feminine singular.

For a masculine plural noun, both the possessive and adjective change, and है becomes हैं.

Example with जूते (shoes):

• मेरे जूते काले हैं। = My shoes are black.

Changes:

• मेरा → मेरे
• काला → काले
• है → हैं

So Hindi agreement affects several words in the sentence.

It is an English borrowing. Hindi commonly uses many borrowed words, especially for everyday objects.

So बैग comes from English bag, but once it is used in Hindi, it follows Hindi grammar rules such as gender and agreement:

• मेरा बैग
• काला बैग
• बैग काला है

This is very common in modern Hindi.

A simple pronunciation guide is:

mera bag kaalaa hai

A slightly more careful breakdown:

• मेरा = may-raa
• बैग = close to beg or bag depending on accent, but in Hindi it is usually said as baig
• काला = kaa-laa
• है = often sounds like hai

So the full sentence is approximately:

may-raa baig kaa-laa hai

In very casual speech or certain contexts, native speakers sometimes drop forms of to be, especially in conversation. But for learners, the standard and safest form is:

• मेरा बैग काला है।

If you say only मेरा बैग काला, people may still understand you in context, but it is not the best default for standard Hindi learning. Keep है unless you have a good reason not to.