Tsukatta dōgu wa, moto no basho ni shimatte kudasai.

Please put away the tools you used in their original place.

Taisetsu na shorui o dokoka ni wasurete shimaimashita.

I have accidentally left the important documents somewhere.

Kono hon wa omoshirokute, ichinichi de zenbu yonde shimaimashita.

This book was so interesting that I ended up reading it all in one day.

Fuyumono no uwagi o kurōzetto no oku ni shimaimashita.

I put away my winter coats in the back of the closet.

Shukudai o ie ni wasurete kite shimaimashita.

I ended up leaving my homework at home.

Himitsu datta noni, ukkari tomodachi ni hanashite shimaimashita.

Even though it was a secret, I carelessly ended up telling my friend.