how to translate this sentence to engish

Present tense: He finds three pieces of plastic that has come off his partition.
Past tense: He found three pieces of plastic that had come off his partition.

Partition n. Something that divides or separates, as a wall dividing one room or cubicle from another.

He found that three pieces of plastic screens for keeping desks apart were broken into pieces .

He discovered three piece of separations desk rubber gentle breeze disruption


Hope this can help you

He discovered that three lump of plastic screens which separated the deak was broken into pieces.