בשדה הראשון צריך לסמן אם הדרכון שלך עדיין תקף.

Here שדה means a field on a form/screen, not an agricultural field.

So בשדה הראשון means in the first field.

A useful breakdown:

• ב־ = in
• שדה = field
• הראשון = the first

Because this is talking about filling out a form, field is the natural meaning.

Because Hebrew often combines the preposition ב־ (in) with the definite article ה־ (the).

So:

• ב + השדה becomes בשדה

This is very common in Hebrew:

• בבית = in the house
• בשדה = in the field

So the the is still there, but it is absorbed into the preposition.

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

So:

• שדה ראשון = a first field
• השדה הראשון / בשדה הראשון = the first field / in the first field

This is the normal Hebrew word order:

• noun first
• adjective second

Also, the adjective must match the noun in:

• gender
• number
• definiteness

Since שדה is masculine singular, ראשון is also masculine singular.

צריך לסמן literally means something like need to mark or it is necessary to mark.

In Hebrew, especially in instructions, the subject is often left unstated. So even though English says you need to mark, Hebrew can simply say:

• צריך לסמן

This is very common in instructions, notices, and forms.

It feels a bit like:

• one should mark
• you need to mark
• it is necessary to mark

All depending on context.

לסמן is the infinitive to mark, to indicate, or to check off.

In the context of a form, it usually means something like:

• mark
• tick
• indicate
• select

So צריך לסמן means need to mark/indicate.

Here אם means whether.

In English, after verbs like check, know, ask, see, mark, we often use whether. Hebrew uses אם for that kind of yes/no clause.

So in this sentence:

• אם הדרכון שלך עדיין תקף
• whether your passport is still valid

In many contexts, English speakers may also naturally say if, and Hebrew still uses אם.

הדרכון שלך means your passport in the sense of a specific, known passport.

The ה־ makes דרכון definite:

• דרכון = a passport
• הדרכון שלך = your passport

In modern Hebrew:

• הדרכון שלך = your passport / the specific passport that belongs to you
• דרכון שלך can sometimes sound more like a passport of yours or one of your passports

So in this sentence, הדרכון שלך is the natural choice because it refers to the relevant passport.

Because in Hebrew, the verb to be is usually omitted in the present tense.

So:

• הדרכון שלך עדיין תקף
• literally: your passport still valid
• natural English: your passport is still valid

This is normal Hebrew.

Compare:

• הוא עייף = he is tired
• הבית גדול = the house is big
• הדרכון שלך תקף = your passport is valid

But in past and future tenses, Hebrew does use forms of to be when needed.

עדיין means still.

So:

• הדרכון שלך תקף = your passport is valid
• הדרכון שלך עדיין תקף = your passport is still valid

It adds the idea that the passport continues to be valid now, perhaps after some time has passed.

תקף means valid.

It is in the masculine singular form because it describes דרכון, which is a masculine singular noun.

So the agreement is:

• דרכון — masculine singular
• תקף — masculine singular

If the noun were feminine, the adjective would change. For example:

• ויזה תקפה = a valid visa

So תקף is chosen because it matches הדרכון.

Yes. It sounds very natural in instructions on forms, websites, and official documents.

The structure is typical of administrative Hebrew:

• בשדה הראשון = location on the form
• צריך לסמן = instruction
• אם... = what information must be indicated

A slightly more formal alternative might be:

• בשדה הראשון יש לסמן אם הדרכון שלך עדיין תקף.

That also means essentially the same thing, but the original sentence is perfectly normal.