După ce profesoara explică problema din nou, totul devine clar pentru elevi.

After the (female) teacher explains the problem again, everything becomes clear for the students.

Breakdown of După ce profesoara explică problema din nou, totul devine clar pentru elevi.

• pentru: for
• problema: the problem
• totul: everything
• după ce: after

Questions & Answers about După ce profesoara explică problema din nou, totul devine clar pentru elevi.

What does după ce mean here, and how is it different from just după?

după ce is a conjunction meaning “after” (followed by a full clause).

• După ce profesoara explică problema…
  = After the teacher explains the problem…

By contrast, după on its own is a preposition and must be followed by a noun or pronoun, not a full clause:

• după lecție – after the lesson
• după ea – after her

You use:

• după ce
  • finite verb (a whole sentence):
    După ce termin lecția, plec acasă. – After I finish the lesson, I go home.
• după
  • noun/pronoun:
    După lecție plec acasă. – After the lesson, I go home.

What tense are explică and devine in, and how should I understand them?

Both explică and devine are in the present tense, 3rd person singular:

• (profesoara) explică – the (female) teacher explains
• (totul) devine – everything becomes

In this sentence the present has a general / habitual meaning, similar to English:

După ce profesoara explică problema din nou, totul devine clar pentru elevi.
After the teacher explains the problem again, everything becomes clear for the students.

So you should read it as describing something that usually / regularly happens, not a one‑time event.