He took it for granted that everyone agreed with him. この英文の意味は？

Q He took it for granted that everyone agreed with him. この英文の意味は？

ひー とぅっく いっと ふぉー ぐらんてっど ざっと えぶりわん あぐりーど うぃず ひむ。このえいぶんのいみは？