Συμπληρώνω το ερωτηματολόγιο μετά το μάθημα.

Συμπληρώνω usually means I fill in, I fill out, or I complete, depending on context.

With το ερωτηματολόγιο (the questionnaire), the most natural English idea is:

• I fill in the questionnaire
• I fill out the questionnaire
• I complete the questionnaire

So it can refer either to physically writing answers into a form or more generally completing it.

In Modern Greek, the present tense can cover both:

• I fill in the questionnaire after the lesson (habitual / general)
• I am filling in the questionnaire after the lesson (currently happening)

The exact meaning depends on context.

So this sentence by itself could mean:

• something the speaker usually does, or
• something happening now

Greek often relies on context where English may choose between simple present and present continuous.

Because το is the definite article the for neuter singular nouns.

Here:

• το ερωτηματολόγιο = the questionnaire
• το μάθημα = the lesson / the class

Greek uses the definite article very regularly, often more regularly than English does. So even where English might sometimes say after class, Greek naturally says μετά το μάθημα.

Greek nouns have grammatical gender: masculine, feminine, or neuter.
Ερωτηματολόγιο happens to be a neuter noun, so it takes the neuter article το.

This is something learners mostly have to memorize with each noun:

• το ερωτηματολόγιο = the questionnaire
• το μάθημα = the lesson

The gender does not mean the object is biologically neutral; it is just a grammatical category.

It is in the accusative case because it is the direct object of Συμπληρώνω.

The speaker is doing the action to the questionnaire, so it is the object:

• Συμπληρώνω = I fill in / complete
• το ερωτηματολόγιο = the questionnaire

A useful point: for many neuter singular nouns, the nominative and accusative forms are the same, so you do not see a change here.

Μετά means after, and in Modern Greek it is commonly followed by the accusative:

• μετά το μάθημα = after the lesson / after class

So:

• το μάθημα is in the accusative after μετά

This is very common and natural Greek.

Yes, you can. Both are possible:

• μετά το μάθημα
• μετά από το μάθημα

In many everyday contexts, they mean the same thing: after the lesson.

However, μετά το μάθημα is very common and slightly more direct/simple here. Learners should definitely recognize both patterns.

It can mean either, depending on context.

So μετά το μάθημα may be understood as:

• after the lesson
• after class

If you are talking about school, university, or a course, μάθημα is a very common word for a teaching session or subject area.

Greek word order is more flexible than English word order.

This sentence is perfectly natural:

• Συμπληρώνω το ερωτηματολόγιο μετά το μάθημα.

But you could also say:

• Μετά το μάθημα συμπληρώνω το ερωτηματολόγιο.

Both mean the same basic thing. The second version puts more focus on after the lesson.

Greek often changes word order for emphasis, rhythm, or topic-focus, while English is usually more fixed.

A rough pronunciation guide is:

sim-pli-RO-no to e-ro-ti-ma-to-LO-yo me-TA to MA-thi-ma

A few stress points:

• Συμπληρώνω → stress on ρώ
• ερωτηματολόγιο → stress on λό
• μετά → stress on τά
• μάθημα → stress on μά

The stress marks written in Greek are important and should be learned.

Greek generally uses definite articles more often than English.

So even if English often says:

• after class

Greek naturally says:

• μετά το μάθημα

This does not necessarily sound especially definite in the English sense. It is simply the normal Greek structure.

Yes, depending on the nuance.

Possible alternatives include:

• συμπληρώνω = fill in / complete
• ολοκληρώνω = finish / complete
• καταγράφω = record / write down, in some contexts

But with questionnaire, συμπληρώνω is the most natural and idiomatic choice, because questionnaires and forms are typically filled in.

The dictionary form is συμπληρώνω.

The form in the sentence is the same spelling, just capitalized because it begins the sentence:

• συμπληρώνω = I fill in / I complete

This is 1st person singular, present tense, so it means I fill in / I am filling in.