slip|slipped|slipping|slips

她在冰上滑倒了。

She ___slipped on the ice.

小心别滑倒——地板上有水。

Careful you don't ___slip - there's water on the floor.

但后来我滑倒了摔了下来。

But then I ___slipped and fell down.

他在湿滑的地板上打滑，但设法保持了平衡。

He is ___slipping on the wet floor, but he manages to catch his balance.

他趁没人注意时从门底下塞进一张纸条。

He ___slips a note under the door when no one is looking.