For those who don't know what Mad Libs are, Mad Libs is a fill in the blank word game. It's really simple you just fill in the blank with the word the sentence asks for. 

For example:

I (verb) to the (noun).

I ran to the store. (Lame I know but sometimes it's funny)

for those who don't know English well and don't remember or understand the words adjective, adverb, noun, and verb I will remind you.

Adjective is a word that describes something or someone like pretty hard y etc.

Adverb is a word that describes a verb or an adjective and usually ends in an 'ly' like happily, stupidly, greedily, etc.

Noun is a person, place or thing. Plural noun is just means more than one and a proper noun is a specific name like James, London.

Verb is an action word like ran, swim, sing.

Other things can be asked and if need explaining they will be explained.

for adjective, suffixes are just er and est. Like, you are pretty but Taemin is prettier but Luhan is prettiest.