Learn Hardcore Japanese: raigetu siken ga arimasu.

In Japanese, time expressions (like “next month”) often appear without a particle. You could say 来月に試験があります, but the particle に is usually dropped in simple statements. Omitting it feels more natural and conversational.

Why is 試験 marked with が instead of は?

When you use existence verbs such as あります (to exist/happen), the thing that exists is marked by が. Here you’re simply stating “An exam exists (will take place).” If you switched to は, it would shift the focus or topic, implying contrast or known context (e.g. “As for the exam, …”), which doesn’t fit a neutral announcement.

What does あります mean in this sentence?

あります is the polite form of ある, which means “to exist” for inanimate things or events. In English it’s rendered as “there is/are” or “(an event) will take place.” So 来月試験があります means “There will be an exam next month.”

Can I use います instead of あります?

No. います is used for living creatures (people or animals). 試験 (exam) is not a living being, so you must use ある／あります for its existence.

Could I reorder the words as ?