YOU SAID:
引越しが多くて友達ができなかった。
INTO JAPANESE
引越しが多くて友達ができなかった。
BACK INTO ENGLISH
I couldn't make friends because I moved a lot.
INTO JAPANESE
引っ越しが多かったので友達ができませんでした。
BACK INTO ENGLISH
I couldn't make friends because I moved a lot.
That didn't even make that much sense in English.