‘=>Could have + past participle
->Could have + past participle means that something was possible in the past, or you had the ability to do something in the past, but that you didn’t do it. (See also modals of ability .)
?Examples:
-I could have stayed up late, but I decided to go to bed early.
-They could have won the race, but they didn’t try hard enough.
-Julie could have bought the book, but she borrowed it from the library instead.
-He could have studied harder, but he was too lazy and that’s why he failed the exam.
