直到老板指出来，他才注意到那个错误。
He didn't notice the mistake until his boss pointed it out.
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didn't英 /ˈdɪdnt/|美 /ˈdɪdnt/
notice英 /ˈnəʊtɪs/|美 /ˈnoʊtɪs/
解释
didn't 与动词 notice 构成过去否定，until 从句说明否定状态持续到的时间点。
He didn't notice the mistake until his boss pointed it out.
didn't 与动词 notice 构成过去否定，until 从句说明否定状态持续到的时间点。