如every day 是adverb; 但everyday是 adjective。
如 after school 是adverb;但afterschool 是adjective。
She practises piano every day after school. (這兩個組合都是時間adverb。)
She practises afterschool【adj.】 piano every day. (afterschool 變成adj.,afterschool piano譯成「放學後的鋼琴」)
This is the everyday【adj.】 activity she is used to practising. (這是她一向習慣練習的【每天活動】。)
相關片語
everyday life 每天【的】生活
everyday use 每天【的】用途
afterschool activities 放學後的活動