मेरा बैग अंदर है।

Because मेरा has to agree with बैग, not with the speaker.

In Hindi, possessive words like मेरा / मेरी / मेरे change according to the gender and number of the noun being possessed.

• मेरा = for a masculine singular noun
• मेरी = for a feminine singular noun
• मेरे = for plural nouns, or certain oblique forms

Since बैग is usually treated as a masculine singular noun in Hindi, मेरा बैग is correct.

For comparison:

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

बैग is a borrowed word from English bag, but it is very commonly used in Hindi.

Hindi uses many everyday loanwords, especially for modern objects. Even though बैग comes from English, once it is used in Hindi, it behaves like a Hindi noun in grammar. That means it gets a gender, and here it is commonly treated as masculine.

So you can use it naturally in Hindi:

• मेरा बैग
• यह बैग
• बैग अंदर है

अंदर means inside or indoors.

In this sentence, it tells you the location of the bag:

• बैग अंदर है = the bag is inside

It can be used in a few related ways:

• अंदर है = is inside
• अंदर जाओ = go inside
• घर के अंदर = inside the house

So in मेरा बैग अंदर है, अंदर is functioning as a location word.

Hindi does not have articles like English a, an, and the.

So where English says:

• My bag is inside

Hindi simply says:

• मेरा बैग अंदर है।

Whether something is definite or indefinite is usually understood from context.

This is very normal in Hindi:

• किताब मेज़ पर है। = The book is on the table / A book is on the table
• मेरा बैग अंदर है। = My bag is inside

Hindi usually puts things in this kind of order:

possessor + noun + location + verb

So:

• मेरा = my
• बैग = bag
• अंदर = inside
• है = is

This gives: मेरा बैग अंदर है।

That is a very natural Hindi sentence pattern. English also uses a similar order here, but in Hindi the verb है usually comes at the end.

है means is.

Hindi often places the main verb or linking verb at the end of the sentence. So instead of saying:

• My bag is inside

Hindi says literally:

• My bag inside is

This is normal Hindi sentence structure.

Also, है is used for singular subjects:

• बैग अंदर है। = The bag is inside.

If the subject is plural, you usually use हैं:

• मेरे बैग अंदर हैं। = My bags are inside.

Good question. में and अंदर are related, but they are not always used in the same way.

• में = in / inside
• अंदर = inside

In this sentence, अंदर works well by itself because the location is understood from context, like inside in English.

For example:

• मेरा बैग अंदर है। = My bag is inside.
• मेरा बैग कमरे में है। = My bag is in the room.
• मेरा बैग कमरे के अंदर है। = My bag is inside the room.

So:

• अंदर can stand alone if the place is understood
• में is used when you name the place directly
• के अंदर is used when you explicitly say inside a particular thing/place

Yes, you could, but अंदर is much more common in everyday speech.

• मेरा बैग अंदर है। = very natural, everyday
• मेरा बैग भीतर है। = also correct, but a bit more formal, literary, or regional in feel

So for ordinary conversation, अंदर is the safer and more common choice.

A simple pronunciation guide is:

meraa bag andar hai

A bit more carefully:

• मेरा ≈ may-raa
• बैग ≈ baig / beg (depending on accent)
• अंदर ≈ un-dur or an-dur
• है ≈ hai (like high, but often shorter/softer in speech)

A natural rhythm would be:

MAY-raa baig UN-dur hai

You would usually say:

मेरे बैग अंदर हैं।

Two things change:

1. मेरा becomes मेरे
2. है becomes हैं

So:

• मेरा बैग अंदर है। = My bag is inside.
• मेरे बैग अंदर हैं। = My bags are inside.

This happens because the noun becomes plural, and the possessive and verb change accordingly.

Yes, absolutely, if the context already makes it clear whose bag you mean.

• बैग अंदर है। = The bag is inside. / Bag is inside.
• मेरा बैग अंदर है। = My bag is inside.

Hindi often leaves out information that is already understood from the conversation. So if everyone knows you are talking about your bag, dropping मेरा can sound perfectly natural.