Bob went to bed at 10 o'clock,His mother came back home at 10 o'clock合并为一句. Bob go to bed his mother came back home at 10 0'clock

Bob went to bed at 10 o'clock,His mother came back home at 10 o'clock
合并为一句. Bob go to bed his mother came back home at 10 0'clock

didn't until

Bob didn't go to bed until his mother came back home at 10 o'clock.
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加油！不明白再问！如果帮到你，请及时采纳，谢谢！
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