What is the difference between "can have + past participle " and "could have + past participle"?

Part consider this quote from the video: i don't think ravi felt isolated. i think he was bored, and he didn't think the game was very interesting. like he wanted to hide so that he didn't have to play, and he could just chill and wait it out. do you agree or disagree with this point of view? find evidence from the story to support or refute the student's claim. in your response, clarify why you agree or disagree with the student's thoughts.

When the telephone rings incessantly, what is it that the men want to have happen? they want the phone to be answered because it is jangling their nerves. they want mr. frank to go to the office and answer it because they are afraid it might be bad news. they want mr. frank to go to the office because they think it might be miep. they want mr frank to ignore the phone.

8. "caged bird" right now, i feel like a bird caged without a key everyone comes to stare at me with so much joy and reverie they don't know how i feel inside through my smile, i cry they don't know what they're doing to me keeping me from flying that's why i say i know why the caged bird sings only joy comes from song she's so rare and beautiful to others why not just set her free? so she can fly, fly, fly spreading her wings and her song let her fly, fly fly for the whole world to see she's like caged bird fly, fly ooh just let her fly just let her fly just let her fly spread the wings spread the beauty what is the allusion found in the poem? question 8 options: a) alicia keys b) i know why the caged bird sings c) spreading her wings and her song d) fly, fly, fly