The two students both insisted that they were right,so the teacher did not know who was to_____A.blame blamed(為什么不用被動，此類句子什么情況下用被動啊？）

熱心網友

betoblame本身意義為“該受到責備,該負責”不必用被動。 +todo;計劃、將來、安排、打算。。。

熱心網友

be to blame (for sth)，對某壞事應負責任，應受責備；是一個習慣用語。更多的例子：Which driver was to blame for the accident?She was in no way to blame.決不應該責備她。你所提問的的句子也屬于一個純粹的習慣用法（或者在英語中稱為成語）。如果換成其他詞，應當用被動態。