Answer:
Here are the definitions
Step-by-step explanation:
Conjunctions are the words used to connect sentences in same clause. ( eg: and, but)
Prepositions are the class of words used to express temporal roles. ( eg: below, beneath, above)
Adverbs are the words that modifies the verb, adjectives, other adverbs or the whole sentence. ( eg: early, always, never)
WH questions are the questions starting with one of Wh forms( what, when, where)