هي تحرك قطعة اللعب.

هي usually means she, but it can also mean it when it refers to a grammatically feminine noun.

So in this sentence, هي could refer to:

• a female person: she
• a feminine noun mentioned earlier: it

If your lesson gives the meaning as she, then that is the intended reading here.

In Arabic, the verb already tells you the subject here. تحرك in this sentence is understood as she moves.

That means هي is often optional. Arabic can simply say:

تحرك قطعة اللعب

and it can still mean She moves the game piece.

Adding هي can:

• make the subject clearer
• add emphasis, like she moves it
• help beginners read the sentence more easily

Here it is read as تُحَرِّكُ (tuḥarriku).

This is the present tense form meaning she moves or she is moving.

Without short vowels, تحرك can be ambiguous in writing, but the context here points to tuḥarriku.

Here تحرك is a transitive verb, meaning it takes a direct object: she moves something.

The base verb is حرّك = to move something.

So:

• تُحَرِّكُ = she moves
• قطعة اللعب = the thing being moved

This is different from an intransitive idea like she moves / she is moving around, which would usually be expressed with a different form, often تتحرك.

Because this is an iḍāfa construction, often called a construct phrase.

In an iḍāfa:

• the first noun does not take ال
• the first noun does not take tanwīn
• the second noun tells you whether the whole phrase is definite

So in قطعة اللعب:

• قطعة = piece
• اللعب = the play / the game context

Since the second word is definite with ال, the whole phrase is definite: the game piece / the playing piece

For the same reason: it is the first word in an iḍāfa.

Normally, an indefinite noun might appear with tanwīn, but the first noun in an iḍāfa loses tanwīn.

So you get:

• not قطعةٌ اللعب
• but قطعة اللعب

That is a very common Arabic pattern.

Literally, it means piece of play or piece of the game/play activity.

In natural English, that usually becomes:

• the game piece
• the playing piece

Arabic often uses noun-plus-noun combinations where English uses a compound noun.

This sentence is:

• هي = subject
• تحرك = verb
• قطعة اللعب = object

So the order is subject + verb + object.

Arabic is flexible with word order, but this pattern is very common, especially when an independent pronoun like هي is stated.

A careful fully vocalized reading would be:

هِيَ تُحَرِّكُ قِطْعَةَ اللَّعْبِ

This shows the grammar more clearly:

• هِيَ = she
• تُحَرِّكُ = she moves
• قِطْعَةَ = direct object, so it is accusative
• اللَّعْبِ = second noun in the iḍāfa, so it is genitive

In everyday writing, these short vowels are usually omitted.