のではないか

(No de ha nai ka)

Suggests a possibility or expresses one's opinion or doubt politely.

Connection rules

この計画けいかくには問題もんだいがあるのではないか。

Kono keikaku ni ha mondai ga aru no de ha nai ka.

Isn't it possible that there is a problem with this plan?

「Business meeting critique」

彼かれは真実しんじつを隠かくしているのではないか。

Kare ha shinjitsu wo kakushi te iru no de ha nai ka.

I suspect he might be hiding the truth.

「Investigating a secret」

Don't you think the price of this product is a bit too high?

この商品の値段は少し___。

Romaji also accepted