Ich habe den Fragebogen später noch einmal gelesen.

I read the questionnaire again later.

Breakdown of Ich habe den Fragebogen später noch einmal gelesen.

• ich: I
• haben: to have
• lesen: to read
• später: later
• noch einmal: again
• der Fragebogen: the questionnaire

Questions & Answers about Ich habe den Fragebogen später noch einmal gelesen.

Why is den Fragebogen in the accusative case here?

Den Fragebogen is the direct object of the verb lesen. In German, direct objects take the accusative case. Since Fragebogen is masculine (der Fragebogen in the nominative), it changes to den in the accusative.

Why does this sentence use haben as the auxiliary verb instead of sein?

In German’s Perfect (Perfekt) tense, most verbs use haben as their auxiliary. Only a small group of intransitive verbs of motion or change of state takes sein. Lesen is a transitive verb (it has a direct object), so it pairs with haben.

Why is gelesen placed at the end of the sentence?

In main clauses in Perfekt, the finite auxiliary verb (habe) occupies the second position (after the subject), and the past participle (gelesen) goes to the very end. This is a core rule of German word order:
• Position 1: Subject or other element
• Position 2: Finite verb (auxiliary)
• Middle field: Objects and adverbials
• End field: Past participle or infinitive

What does noch einmal mean, and are there other ways to say “again” in German?

Noch einmal literally means “one more time” or “again.” You can also say:
• nochmal (colloquial, contracted)
• nochmals (more formal)
• wieder (general “again,” sometimes more neutral)
Use noch einmal when you want to emphasize a repeated action.

Why are the adverbs später and noch einmal placed after the object, and can I switch their order?

German mid‐field word order generally follows:

1. Objects
2. Time adverbials (when?)
3. Manner adverbials (how?)
4. Place adverbials (where?)
   Here, den Fragebogen (object) comes first, then später (time) and noch einmal (manner). Swapping to noch einmal später would break this hierarchy and sound odd.

Could I start the sentence with Später (e.g. “Später habe ich den Fragebogen noch einmal gelesen”)? Does that change the meaning?

Yes. Fronting a time adverb for emphasis is perfectly fine. You would then say:
“Später habe ich den Fragebogen noch einmal gelesen.”
This shifts später to position 1, keeps habe in position 2, and the overall meaning stays the same, but it highlights later.

What is Fragebogen, and how do I form its plural?

Fragebogen is a compound noun made of Frage (question) + Bogen (sheet). It means questionnaire or survey. The plural is die Fragebögen (an umlaut is added to o, no extra ending).