בכניסה ביקשו ממני תעודת זיהוי, כי הדרכון נשאר בבית.

Hebrew often uses 3rd person plural as an impersonal form, much like English they in they asked me for ID when the exact people are not important.

So ביקשו ממני means they asked me, but it does not have to mean a specific group already mentioned. It can refer to staff, guards, officials, and so on.

If you wanted to name them, you could say something like: המאבטחים ביקשו ממני תעודת זיהוי
= The security guards asked me for ID

בכניסה is ב־ + כניסה.

• ב־ = in / at / on
• כניסה = entrance / entry

So בכניסה means at the entrance or upon entering, depending on context.

In this sentence, it gives the setting first: At the entrance, they asked me for ID...

Putting בכניסה first highlights the situation or setting before the main action. Hebrew often does this naturally.

So:

• בכניסה ביקשו ממני... = At the entrance, they asked me...
• ביקשו ממני בכניסה... is also possible, but it sounds a little less natural in this context.

The fronted word order is very common when the speaker wants to set the scene first.

Because the verb לבקש works like to ask/request something from someone.

The pattern is:

לבקש משהו ממישהו
= to ask/request something from someone

So:

• ביקשו ממני תעודת זיהוי = they asked me for an ID
• literally: they requested an identification document from me

Using אותי here would not fit this structure.

This is a construct phrase in Hebrew, called סמיכות.

• תעודה = certificate / document
• זיהוי = identification

Together, תעודת זיהוי means identification document or ID.

The first noun changes into its construct form:

• תעודה
• תעודת ...

This is very common in Hebrew, for example:

• בית ספר = school
• תעודת זהות = identity card
• חדר שינה = bedroom

Because here it is being used indefinitely: they asked for some ID / an identification document, not a specific previously mentioned one.

So:

• ביקשו ממני תעודת זיהוי = they asked me for an ID
• ביקשו ממני את תעודת הזיהוי would mean they asked me for the specific ID document

In many real-life situations, Hebrew leaves it indefinite because the point is simply that some valid ID was required.

Here כי means because.

So the second part gives the reason: כי הדרכון נשאר בבית
= because the passport was left at home

Yes, you can replace it with other expressions, though the style changes a bit:

• מפני ש־ = because
• בגלל ש־ = because
• כי = very common and neutral

In this sentence, כי is simple and natural.

נשאר means remained / stayed / was left behind. It focuses on what happened to the passport, not on the speaker’s action.

• הדרכון נשאר בבית = the passport stayed/remained at home
• natural English meaning: I left the passport at home

If you said:

השארתי את הדרכון בבית
that would mean more directly:
I left the passport at home

Both are possible, but they focus on different things:

• נשאר = focus on the passport’s situation
• השארתי = focus on what I did

Because the subject is הדרכון, and דרכון is masculine singular.

So the verb must agree with it in gender and number:

• הדרכון נשאר = masculine singular
• if the subject were feminine, you would use נשארה

For example:

• התעודה נשארה בבית = the document was left at home

Hebrew often uses the definite form when possession is already obvious from context.

Here, if someone says they were asked for ID and then explains that the passport was at home, it is naturally understood to mean their passport.

So:

• הדרכון נשאר בבית = the passport was left at home
• in context: my passport was left at home

You could also say:

כי הדרכון שלי נשאר בבית

That is more explicit, but not necessary.

Literally, בבית is in the house / in the home.

But in everyday Hebrew, בבית is very commonly used just like English at home.

So:

• אני בבית = I’m at home
• הדרכון נשאר בבית = the passport was left at home

This is one of those places where the most natural English translation is not the most literal one.

It is mostly neutral everyday Hebrew.

A few notes:

• ביקשו ממני תעודת זיהוי sounds normal in everyday speech and also in more formal situations.
• הדרכון נשאר בבית is also natural and common.
• The whole sentence sounds like something a person would actually say in real life.

So this is a good, useful model sentence for normal spoken and written Hebrew.