onon Basic wordsalso onCEFR Beginners (A1)? CEFR Elementary (A2)? CEFR Intermediate (B1)? CEFR Upper intermediate (B2)? CEFR Mastery level (C2)? Band 1 (BND1)? (放,向前,穿,连接)上,(继续)下去, 在…上面 on on(adverb) (放,向前,穿,连接)上,(继续)下去 on on(preposition) 在…上面 onto onto(preposition) 在…之上,对…了解,映射到…上 Forms adverbpreposition on on onto