YOU SAID:

She saw a seesaw sawing a seat

INTO JAPANESE

彼女はシートを鋸で切ったシーソーを見た

BACK INTO ENGLISH

She saw a seesaw sawing through the sheet

INTO JAPANESE

彼女はシートをシーソーで切っているのを見た

BACK INTO ENGLISH

I saw her cut the sheet with a seesaw

INTO JAPANESE

私は彼女がシーソーでシートを切るのを見た

BACK INTO ENGLISH

I saw her cut the sheet with a seesaw