Fail to understand idioms, miss the point, it's all Greek to someone, not have a clue, can't get your head around something, can't make head or tails of something, go over someone's head, can't fathom, be lost on someone, be beyond someone, idioms meaning to fail to understand something, C1 and C2 grammar, Advanced English grammar, C2 Grammar, C1 Advanced Grammar, C2 Proficiency Grammar, Grammar for C2, Grammar for CAE, Grammar for CPE, gramática para el C1, gramática para el C2 de inglés, Cambridge English grammar.
