Possible meanings are 1) God was referring to one human, the man, or 2) God was referring to humans in general, so this would mean the man and his wife. Even if God was speaking about one person, what he said applied to both of them.
Here "good and evil" is a figure of speech that refers to both extremes and everything in between. See how you translated "knowledge of good and evil" in [Genesis 2:9](../02/09.md). AT: "knowing everything, including both good and evil" (See: [[rc://en/ta/man/translate/figs-merism]])
"God forced the man to leave the garden." This refers to the event in [Genesis 3:23](./22.md), where it says "Yahweh God sent him out of the garden of Eden." God did not send the man out a second time.
Possible meanings are 1) a sword that had flames coming from it or 2) a fire that was shaped like a sword. Languages that do not have swords could use another weapon such as a spear or arrow.