2

Nihongo ha kyuu kagetsu ni benkyou shiteiru
= I've been studying japanese for 9 months.

If it's wrong, why? Should it be "kyuu kagetsu go ni?"

2

I would rather say: 私は九ヶ月間、日本語を勉強しています。(Watashi ha kyuukagetsu kan nihongo wo benkyoushiteimasu).

In this case of a continued action in time you do not need at all the particle に after the word indicating how much time you have been doing something. Add instead 間 (kan) that indicates a span/length of time. Also, を (wo) should mark the object/what is that you are studying (in this case Japanese).

Actually, there is a related question here.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.