ame no hi ni kuruma o untensuruno wa abunai desu.

It is dangerous to drive a car on rainy days.

Breakdown of ame no hi ni kuruma o untensuruno wa abunai desu.

• は: topic particle
• です: to be
• 車くるま: car
• を: direct object particle

Questions & Answers about ame no hi ni kuruma o untensuruno wa abunai desu.

What does の in 雨の do?

The の in 雨の is the genitive (possessive) particle. It links two nouns—here 雨 (rain) and 日 (day)—to form 雨の⽇, literally “day of rain,” i.e. “a rainy day.”

Why is に used after 雨の日?

The particle に marks a point in time. When you attach に to 雨の日, it becomes “on a rainy day” or “when it rains.” Without に, 雨の日 is just a noun phrase; 雨の日に tells us when something happens.

Why is 車を marked with を instead of 車で?

• 車を運転する means “to operate/drive a car.” Here 車 is the direct object of 運転する, so it takes を.
• 車で～行く uses で to mean “go by car,” i.e. the means of transport. If you said 車で運転する, it would sound like “operate something by means of a car,” which is awkward. Use 車を運転する for “drive a car,” or 車で行く for “go by car.”

What is the role of の after 運転する?