WORD CLASSES

Words which belong to the same class function in much the same way, so, identifying the word class is really useful in English: i.e,  is the word "fly" and adjective, a noun, a verb, an adverb? can it belong to more than one word class? In English yes, it can. Look at the definition of "fly" from word reference and notice how a different word class makes such a big difference! And when you finish, check if you remember the word classes in English with this exercise.

For the verb: "to fly"

Simple Past:	flew
Past Participle:	flown

wordReference Random House Learner's Dictionary of American English © 2018

fly¹ /flaɪ/  v.,  flew /flu/  or, for 11., flied, flown/floʊn/,  fly•ing, n., pl.  flies. v.

1. to move through the air using wings:[no object]Outside the birds were flying.

fly² /flaɪ/  n.[countable], pl.  flies. 

1. Insectsa two-winged insect, such as the common housefly.a fishing lure dressed to resemble an insect or small fish.