... そうにしている => to look ~, to seem~ N4
Evaluate
そうにない => N2
Potential, Possibility
そうにない/そうもない => very unlikely to; showing no signs of ~ N2
それはそうと => anyway N2
...そうにみえる => to look; to seem; to appear N4
Speculation
いかにも…そうだ => Looks truly... N3
Accept, agree
そうかといって => but still N3
Beyond expectations
どうも ... そうだ/ ようだ/ らしい => It seems, probably N3
Speculation
に[相違「そうい」]ない => No doubt N2
Information, Report
そうです => That's right N5
Confirm
そう...ない => very unlikely to; showing no signs of ~ N3
Reach level
そうになる => for something to almost happen, to be about to happen N3
Short period of time