تسحب صديقتي بطاقة لعب.

Because the subject is صديقتي, which is feminine singular.

In the present tense, Arabic marks person and gender on the verb:

• يـ... often marks he
• تـ... can mark she or you, depending on context

So تسحب here means she draws / she pulls.

With full vowels, it is تَسْحَبُ (tasḥabu).

It can mean either, depending on context.

Arabic present tense often covers both:

• she draws
• she is drawing

So this sentence could describe:

• a habitual action: My friend draws a playing card
• an action happening now: My friend is drawing a playing card

Context tells you which is meant.

صديقتي means my female friend.

It is made of:

• صديقة = female friend
• ـي = my

So:

• صديقتي = my female friend

Depending on context, it can also mean my girlfriend, but grammatically it literally means my female friend. Arabic often relies on context to distinguish those meanings.

Because ة (called taa marbuuTa) is often pronounced as -a when the word stands alone, but it turns into t when something is attached after it, such as a possessive suffix.

So:

• صديقة = ṣadīqa
• صديقتي = ṣadīqatī

This is very common in Arabic:

• سيارة = car
• سيارتي = my car

Because verb–subject–object word order is very common in Modern Standard Arabic.

So:

• تسحب صديقتي بطاقة لعب = My friend draws a playing card

But you can also say:

• صديقتي تسحب بطاقة لعب

That version is also correct. It puts the subject first, which can feel a little more like As for my friend, she draws a playing card or simply give the subject more prominence.

Because Arabic has no indefinite article.

English uses:

• a card
• an apple

Arabic usually just uses the bare noun if it is indefinite:

• بطاقة = a card

If Arabic wants to make a noun definite, it often uses:

• الـ = the
• a possessive ending, like ـي = my
• or a construct phrase

So here بطاقة is simply a card.

It is an iḍāfa construction, often called a construct phrase.

Literally, it means something like:

• card of play/game

In natural English, that becomes:

• a playing card

So:

• بطاقة = card
• لعب = play / game / playing

Arabic often uses this noun + noun structure where English might use an adjective:

• طالب جامعة = university student
• غرفة نوم = bedroom
• بطاقة لعب = playing card

Because it is the first noun in an iḍāfa.

In Arabic, the first noun in an iḍāfa:

• does not take الـ
• does not take tanween

So even though بطاقة لعب is indefinite in meaning, the first word بطاقة does not get tanween because it is in a construct phrase.

If fully vocalized, the phrase would be:

• بِطَاقَةَ لَعِبٍ

Here:

• بِطَاقَةَ is accusative because it is the direct object
• لَعِبٍ is genitive because it is the second part of the iḍāfa

Here لعب is a noun, not a finite verb.

It means something like:

• play
• game
• playing

So بطاقة لعب is literally card of play/game, which English expresses as playing card.

This is a good example of how Arabic may use a noun where English uses an adjective or participle.

Not literally in the artistic sense. The basic idea of سحب is to pull, to draw out, or to extract.

So in card-related contexts, تسحب بطاقة means:

• she draws a card
• she picks a card
• she pulls out a card

This is a natural Arabic way to express drawing a card from a deck.

A careful full pronunciation is:

tasḥabu ṣadīqatī biṭāqata laʿbin

A few helpful notes:

• ḥ = a stronger, breathier h
• ṣ = an emphatic s
• ʿ = the Arabic letter ʿayn, a sound English does not have

If you are reading with full grammatical endings, that pronunciation is the most complete one. In less formal speech, final short vowels are often reduced or dropped.