אני רוצה לקחת את התיק הקטן, אבל המפתח שלך שם.

In normal unpointed Hebrew spelling, both forms are written רוצה. The difference is in pronunciation:

• male speaker: rotze
• female speaker: rotza

So the writing stays the same, but the spoken form changes. This is very common in Hebrew without vowel marks.

After רוצה (want), Hebrew normally uses an infinitive: to take, to eat, to go, etc.

So:

• רוצה לקחת = want to take
• רוצה לאכול = want to eat
• רוצה ללכת = want to go

לקחת is the infinitive form of לקח (to take).

את here is the direct object marker. It usually has no separate English translation. Hebrew uses it before a definite direct object.

So in:

אני רוצה לקחת את התיק הקטן

the thing being taken is התיק הקטן, and since it is definite (the small bag/case), Hebrew adds את before it.

Because המפתח שלך is not the direct object. It is the subject of the second clause:

אבל המפתח שלך שם = but your key is there

So:

• את appears before a definite direct object
• it does not appear before a subject

That is why you get את התיק הקטן, but not את המפתח שלך.

In Hebrew, adjectives usually come after the noun they describe.

So:

• תיק קטן = a small bag/case
• literally: bag small

This is the normal Hebrew word order for noun + adjective.

When a noun is definite and it has an adjective, Hebrew usually marks both the noun and the adjective as definite.

So:

• תיק קטן = a small bag/case
• התיק הקטן = the small bag/case

This is a very important Hebrew pattern.

Hebrew usually places possessive words like שלי, שלך, שלו, שלה after the noun.

So:

• המפתח שלך = your key
• literally something like the key of yours

That is the normal Hebrew structure. English puts your before the noun, but Hebrew usually puts שלך after it.

Because in Hebrew, a noun with a possessive like שלך is understood as definite. With most ordinary nouns, standard Hebrew commonly uses the definite article on the noun:

• המפתח שלך = your key

English does not say the your key, but Hebrew expresses possession differently, so the ה־ is normal here.

In the present tense, Hebrew usually omits the verb to be.

So:

• המפתח שלך שם
• literally: your key there
• natural English: your key is there

This is a basic feature of Hebrew. In past or future sentences, forms of להיות are used more often, but in the present tense they are usually left out.

Here, שם means there.

So:

• המפתח שלך שם = your key is there

Be careful: שם can also mean name in other contexts. The meaning depends on the sentence. Here it clearly means there.