YOU SAID:

I need to study for tests

INTO JAPANESE

テストのために勉強する必要があります

BACK INTO ENGLISH

I need to study for the test

INTO JAPANESE

試験勉強をしなくちゃ。

BACK INTO ENGLISH

I have to prepare for the test.

INTO JAPANESE

試験勉強をしなくちゃ。

BACK INTO ENGLISH

I have to prepare for the test.