Breakdown of Ich gehe niemals ohne Regenschirm spazieren.
Questions & Answers about Ich gehe niemals ohne Regenschirm spazieren.
The preposition ohne (“without”) always takes the accusative case. Therefore Regenschirm appears in accusative singular (which for masculine nouns looks identical to the nominative form).
Example:
• ohne Regenschirm = “without an umbrella”