Questions & Answers about Nachts schlafe ich.
Why is it schlafe ich and not ich schlafe?
In German, the main verb is almost always the second idea in a statement. Because this sentence starts with the time word Nachts (At night), the verb schlafe must come next in position 2. This pushes the subject ich into the third spot.
This lesson is about vowel-changing verbs. Why doesn't schlafe have a vowel change here?
schlafen is indeed a vowel-changing strong verb (the "a" changes to "ä"), but vowel changes in the present tense only ever happen in the du (you) and er/sie/es (he/she/it) forms. Because the subject here is ich (I), it uses the standard regular ending without any vowel change.
What is the -s at the end of Nachts?
Adding an -s to a time of day turns it into a general time adverb. For example, die Nacht is the noun "the night", but adding the -s makes it nachts, which means "at night" or "nights in general". It is only capitalized here because it is the first word of the sentence.
Can I say Ich schlafe nachts instead?
Yes, absolutely! If you start with Ich, the verb schlafe stays in the second position, and nachts moves to the end. Both are perfectly correct. Starting with Nachts just puts a little more focus on the time of day.
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