YOU SAID:

I think I will go to the concert with my friends tomorrow.

INTO JAPANESE

明日は友達とコンサートに行くと思います。

BACK INTO ENGLISH

I think I'll go to a concert with my friends tomorrow.

INTO JAPANESE

明日友達とコンサートに行くと思います。

BACK INTO ENGLISH

I think I'll go to a concert with my friend tomorrow.

INTO JAPANESE

明日友達とコンサートに行くと思います。

BACK INTO ENGLISH

I think I'll go to a concert with my friend tomorrow.