Is the sentence grammatically correct? Our world has been modernized for the last 20 years.

what does it mean? He was thought to be the loser of his graduation class, but now this nerd-do-well could easily buy the figgin' school. ---> what does the figgin' school mean?

which variant is correct? are these sentences correct? John: i visit u in one hour = "he said he visited us in one hour" John: i visited u one hour ago = "he said he has visited us one hour ago" John: i've already visited u today = "he said he had already visited u today" and the last one, if I say to Megan "John visits us in one hour" = "I said to Megan John visited us in one hour" OR "I said to Megan John visits us in one hour" ?

Is it correct? "I had a big dream" or should i write "I had big dream" ?

i need your advice is it correct to write/say "i've decided to get outta the car"? or "i decided to get outta the car" is more correct?

What does it mean? "do your hair" and "do your nails" ?

what's the difference? what's the difference between "turn off the light" and "turn the light off" ?

what's the difference? what's the difference between "to come back" and "to go back" ?

Corndog? . what does the corndog mean? phrase: "u ain't anything but a corndog"