What part of speech is -ed?

"-ed" by itself is not a part of speech. It's a suffix, which means it's added to the end of a word to change its meaning or grammatical function.

Here's how "-ed" functions:

* Past Tense Marker: It's the most common way to form the past tense of regular verbs (e.g., walked, played, jumped).

* Past Participle: It's used to form the perfect tenses (e.g., has walked, had played, will have jumped) and passive voice (e.g., was walked, is played, will be jumped).

* Adjective: Some words ending in "-ed" are adjectives describing a state or condition (e.g., tired, bored, scared).

Examples:

* Verb: "He walked to the store." (past tense)

* Adjective: "She felt tired after the long day."

* Participle: "The ball was thrown by the pitcher."

So, while "-ed" isn't a part of speech on its own, it plays a vital role in modifying words and creating different grammatical structures.