The two most common reciprocal pronouns are:
* each other: Used for two people or things.
* Example: "The two friends gave each other gifts."
* one another: Used for more than two people or things.
* Example: "The team members helped one another with their tasks."
Here are some examples of how these pronouns are used in sentences:
* "The twins love each other very much." (Two people)
* "The students looked at one another nervously." (More than two people)
* "The two countries traded goods with each other." (Two things)
* "The planets in the solar system exert gravitational pull on one another." (More than two things)
It's important to note that while "each other" and "one another" are often interchangeable, "each other" is generally preferred when referring to two people or things, while "one another" is used for more than two.