הדיירת החדשה גרה בקומה השנייה.

Because דיירת is the feminine form of דייר (tenant).

• דייר = a male tenant / tenant (masculine form)
• דיירת = a female tenant

The ה- at the beginning makes it definite, so:

• דיירת = a female tenant
• הדיירת = the female tenant

In this sentence, the tenant is female, so Hebrew uses the feminine noun.

Because in Hebrew, adjectives usually come after the noun they describe.

So:

• דיירת חדשה = new tenant
• literally: tenant new

That is normal Hebrew word order. English usually says new tenant, but Hebrew says tenant new.

Because in Hebrew, when a noun + adjective phrase is definite, both the noun and the adjective normally take the definite article.

So:

• דיירת חדשה = a new tenant
• הדיירת החדשה = the new tenant

This is an important pattern in Hebrew: adjectives agree not only in gender and number, but also in definiteness.

Because Hebrew present-tense forms agree with the subject in gender and number.

Here, the subject is הדיירת החדשה, which is feminine singular, so the verb form is also feminine singular:

• גר = lives, masculine singular
• גרה = lives, feminine singular

So:

• הדייר החדש גר = the new male tenant lives
• הדיירת החדשה גרה = the new female tenant lives

It can actually mean either, depending on context.

In unpointed Hebrew, גרה can be:

• feminine singular present: lives / is living
• feminine singular past: lived

So the form is ambiguous by itself. Context tells you which meaning is intended. In this sentence, the intended meaning is lives.

This is very common in Hebrew: the written form alone does not always show tense as clearly as English does.

It is the preposition ב plus the noun קומה.

• ב = in / on / at
• קומה = floor, story

So בקומה means in/on a floor or in/on the floor, depending on context.

In a definite phrase like בקומה השנייה, the idea is on the second floor. In fully pointed Hebrew, the definite article can be absorbed into the preposition, so this is related to ב + ה + קומה.

For learners, the easiest way to understand it is:

• בקומה השנייה = on the second floor

Because קומה is a feminine noun, and the ordinal adjective must agree with it.

• שני = second, masculine singular
• שנייה = second, feminine singular

So:

• היום השני = the second day
• הקומה השנייה = the second floor

Since קומה is feminine, Hebrew uses שנייה, not שני.

Because prepositions do not match perfectly from one language to another.

Hebrew commonly uses ב in expressions like this:

• לגור בקומה השנייה = to live on the second floor

Even though English says on, Hebrew uses ב. This is just the natural Hebrew idiom, so it is best learned as a set phrase.

It would be:

הדייר החדש גר בקומה השנייה.

The changes are:

• הדיירת → הדייר
• החדשה → החדש
• גרה → גר

But בקומה השנייה stays the same, because it describes the floor, and קומה is still feminine.

Yes, but the meaning changes.

• דיירת חדשה = a new tenant
• הדיירת החדשה = the new tenant

So if you remove ה-, the phrase becomes indefinite.

The same idea applies later in the sentence as well: Hebrew is very sensitive to whether something is definite or indefinite, and that often shows up directly on the words themselves.