Plural of verbs in --y

Y + s ( Vowel + y ) = + s


examples:

day => days
boy => boys
play => plays
donkey => donkeys
monkey => monkeys
toy => toys

y --> ies ( consonant + y => i + es )


examples:

lady => ladies
baby => babies
city => cities
study => studies
fly => flies
cry => cries
injury => injuries
story => stories
copy => copies
hobby => hobbies
country => countries
worry => worries

university >> universities

and thanks for the lesson