～とは限らない (〜to wa kagiranai)
Explanation
Expresses that something is not necessarily true; 'not always', 'not necessarily'.
Formation
Verb-casual + とは限らない, い-Adjective + とは限らない, な-Adjective + だとは限らない, Noun + だとは限らない
Detailed Explanation
The ～とは限らない grammar point is used to express that something is not necessarily true or does not always occur. It can be translated as 'not always' or 'not necessarily' in English. The formation differs depending on whether it is used with a verb, い-adjective, な-adjective, or noun.
Examples
いつも勉強しているとは限らない。
Itsumo benkyou shite iru to wa kagiranai.
It's not always true that I'm studying.
高い商品がいいとは限らない。
Takai shouhin ga ii to wa kagiranai.
Expensive products are not necessarily good.
彼が正しいとは限らない。
Kare ga tadashii to wa kagiranai.
It's not necessarily true that he is right.
雨が降るとは限らない。
Ame ga furu to wa kagiranai.
It's not necessarily going to rain.
Grammar content sourced from hanabira.org.