To make the action words end in -ing, it should read like this: It is dangerous when someone is driving a car, talking on a cell phone, and eating a sandwich.
The present continuous form of an action word or verb ends in the suffix -ing.
The present continuous or present participle shows action or condition is happening now, frequently, and may continue into the future.
The format for the present continuous includes: to be [am, is, are] + verb.
Thus, the second sentence in the present continuous form should read like this: It is dangerous when someone is driving a car, talking on a cell phone, and eating a sandwich.
Learn more about the present continuous form at https://brainly.com/question/23245856