behindon Basic wordsalso onCEFR Beginners (A1)? CEFR Intermediate (B1)? CEFR Advanced (C1)? CEFR Mastery level (C2)? Band 1 (BND1)? Band 3 (BND3)? 向背后,在原处,在背后, 在…后,落后于 behind behind(adverb) 向背后,在原处,在背后 behind behind(preposition) 在…后,落后于 Forms adverbpreposition behind behind