给出一个英文单词的定义，要求使用单词进行复数、过去时和进行时等常见形式的变换，并给出相应的解释。
Word: cat
Definition: a small domesticated carnivorous mammal with soft fur, a short snout, and retractable claws.
    "I have a pet cat"
Plural: cats (more than one cat)
    Example: "I saw two cats in the backyard."

Past tense: caught (the action of capturing or grabbing a cat)
    Example: "Yesterday, I caught a stray cat and brought it to the animal shelter."

Present participle: catching (the ongoing action of capturing or grabbing a cat)
    Example: "I am currently catching a cat that escaped from its owner's house." 

Explanation: 
A cat is a small animal that is commonly kept as a pet. It is carnivorous, and has soft fur, a short snout, and retractable claws. When referring to more than one cat, the word is pluralized by adding an "s" to the end. The past tense of "cat" is "caught," which is used when discussing a past action involving a cat, such as catching or grabbing it. Finally, the present participle form of the word is "catching," which is used to describe an ongoing action related to cats.