YOU SAID:
when grandma lifted her flap i cheered
INTO JAPANESE
おばあちゃんがフラップを持ち上げたとき、私は歓声を上げました
BACK INTO ENGLISH
I cheered when Grandma lifted the flap
INTO JAPANESE
おばあちゃんがフラップを持ち上げたとき、私は歓声を上げました
BACK INTO ENGLISH
I cheered when Grandma lifted the flap
That didn't even make that much sense in English.