Who Noticed, and Who Waited?
For a Japanese-to-English rewriting task, Hana is given: 「先生は、生徒たちが自分で気づくまで、答えを言わずに待った。」 The instructions require two English versions: (A) a faithful translation that keeps the teacher as subject and makes clear that the students, not the teacher, did the noticing; (B) a rewrite beginning 'Not until...' that preserves the same event order. A classmate writes: 'The teacher waited without saying the answer until the students noticed it by themselves.' Another writes: 'Not until the students noticed it themselves did the teacher say the answer.' Hana worries that 'waited' is missing in the second and that 'by themselves' sounds like the students were alone. She must decide what is actually required by the Japanese and what the rewrite may legitimately omit.
1. Assess versions A and B. Which meets its instruction, and what revision does each need? Explain the grammar of the 'Not until' opening.
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Version A is basically faithful: the teacher is subject, and 'the students noticed it by themselves' assigns the noticing to the students. Two adjustments improve it. First, 'waited without saying the answer' is slightly redundant; 'held back the answer until...' is tighter. Second, 'by themselves' can suggest 'without company', while 自分で here means 'on their own / without being told'. 'Until the students realized it on their own' is clearer. Version B meets the rewrite instruction: fronting a negative adverbial triggers subject-auxiliary inversion, so 'Not until ... did the teacher say...' is grammatical. It also preserves event order: the students' realization comes first. It legitimately omits 'waited' because 'not until' already conveys that the teacher delayed speaking; however, if the task asks for the waiting to be explicit, use 'Not until the students had realized it on their own did the teacher finally give the answer.'
2. Rewrite the sentence so that it contains 'refrain from' and still makes the students the ones who noticed. Keep the sentence to one sentence.
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The teacher refrained from giving the answer until the students had noticed the problem on their own. Reasoning: 'refrain from' takes a gerund, so 'refrain from giving' is required, not 'refrain to give'. The past perfect 'had noticed' marks the students' realization as complete before the teacher's implied action, matching 気づくまで. 'On their own' translates 自分で as 'without help', not 'alone'. The teacher remains subject throughout, so the contrast in Japanese between the teacher's restraint and the students' independent realization is preserved.