لما يخلص الدرس، رح اشوفك.

Here, لما means when.

In this sentence, it introduces a time clause: when the lesson ends / when the lesson is over.

This لما is very common in Levantine Arabic for talking about something that will happen and what follows after it.

That is very normal in Arabic.

After لما meaning when, Levantine Arabic usually uses the present tense form even if the whole meaning is about the future.

So:

• لما يخلص الدرس = when the lesson finishes
• not literally when the lesson is finishing

English often does something similar:

• When the lesson ends, I’ll see you.

You do not normally say when the lesson will end in English, and Arabic works similarly here.

Here, يخلص means to finish / to end / to be over.

So يخلص الدرس means:

• the lesson finishes
• the lesson ends
• the lesson is over

In this sentence, the lesson itself is the thing that ends, so يخلص is being used intransitively.

Yes, and this is a very useful distinction.

• يخلص usually means finish, end, be over
• يخلّص often means finish something, get something done, make someone finish

So compare:

• يخلص الدرس = the lesson ends
• يخلّص الدرس = he finishes the lesson or he wraps up the lesson

In everyday speech, pronunciation helps distinguish them:

• يِخلَص = yikhlaṣ
• يِخلِّص = yikhalliṣ

In your sentence, the correct meaning is the first one: the lesson ends.

رح marks the future. It is like saying will or going to in English.

So:

• رح اشوفك = I will see you

In Levantine, رح is one of the most common future markers.

You may also hear shorter forms in speech, depending on the region, such as:

• ح شوفك
• هشوفك in some dialects

But رح أشوفك is a very standard Levantine way to say it.

Both may appear, but أشوفك is the more careful standard spelling.

The first-person form أشوف begins with an أ. In informal writing, especially texting or casual messages, people often leave off the hamza and write:

• اشوفك

So:

• أشوفك = more careful spelling
• اشوفك = very common informal spelling

They represent the same word here.

The -ك is the attached object pronoun meaning you.

So:

• أشوف = I see
• أشوفك = I see you / I’ll see you

A useful detail: in speech, the pronunciation depends on whether you are talking to a man or a woman:

• أشوفك to a man = ashūfak
• أشوفك to a woman = ashūfik

In normal Arabic spelling without vowel marks, both are written the same way: أشوفك.

Because Arabic often allows, and often prefers, verb-subject word order.

So:

• يخلص الدرس = literally finishes the lesson
• natural English = the lesson finishes

This is completely normal in Arabic.

You could also hear a subject-first version in some contexts, but يخلص الدرس sounds very natural and common.

A common pronunciation would be:

lammā yikhlaṣ id-dars, raḥ ashūfak
or, if speaking to a woman:
lammā yikhlaṣ id-dars, raḥ ashūfik

A few notes:

• لما = lammā
• يخلص = yikhlaṣ
• الدرس is pronounced with assimilation, so it sounds like id-dars or ed-dars
• رح = raḥ
• أشوفك = ashūfak / ashūfik

Sometimes learners wonder about that, but لما is the more natural choice here.

• لما is commonly used for when in the sense of when that expected event happens
• إذا can sometimes mean if or when, but it does not fit as naturally in this sentence in everyday Levantine

So for When the lesson ends, I’ll see you, لما is the best choice.

Sometimes, yes, depending on context.

In spoken Levantine, people do sometimes use the present tense alone for a future meaning if the context is clear. But adding رح makes the future meaning very clear.

So:

• لما يخلص الدرس، رح أشوفك = very clear: When the lesson ends, I’ll see you
• لما يخلص الدرس، بشوفك = also possible in conversation, depending on dialect and context

For a learner, using رح is a safe and natural choice.