YOU SAID:

when i found she had wreck my car i didn't know what to do

INTO JAPANESE

彼女が私の車を破壊したのを見つけたとき、私は何をすべきかわからなかった

BACK INTO ENGLISH

I didn't know what to do when I found her destroying my car

INTO JAPANESE

彼女が私の車を破壊しているのを見つけたとき、私は何をすべきかわかりませんでした

BACK INTO ENGLISH

I didn't know what to do when I found her destroying my car