摘要:要点: 时间状语从句.由以下连词引导: when while as after before as soon as since till /until by the time 在时间状语从句中.要注意时态一致.一般情况下主句是将来时的时候.从句要用一般现在时.1.when当--的时候 Mozart started writing music when he was four years old. (当)莫扎特的时候.开始写音乐作品.

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