YOU SAID:

I'm trying to concentrate because I'm sleepy

INTO JAPANESE

私は眠いので集中しようとしています。

BACK INTO ENGLISH

You are trying to focus because I'm sleepy.

INTO JAPANESE

私は眠いので集中するときです。

BACK INTO ENGLISH

It is time to focus because I'm sleepy.

INTO JAPANESE

私は眠いので集中する時間です。

BACK INTO ENGLISH

It is time to focus because I'm sleepy.