whenon Basic wordsalso onCEFR Beginners (A1)? CEFR Elementary (A2)? CEFR Intermediate (B1)? CEFR Upper intermediate (B2)? Band 1 (BND1)? Band 2 (BND2)? Band 3 (BND3)? 什么时候,在那时,当时, 在…时,如果,既然 when when(adverb) 什么时候,在那时,当时 when when(conjunction) 在…时,如果,既然 whenever whenever(conjunction) 无论何时,每当 Forms adverbconjunction when when whenever