Backshift
准备班, 交叉班
🗣️ 情景例句
And you didn't exercise?
你没有参加健身操？
All produets have to go through five checks in the whole process.
所有产品在整个生产过程中得通过五道质量检查关。
He set out to discover whether the wagging dance showed direction.
他开始着手找出摇摆舞是否表示方向。