In the past ,all of the buses were double-decker ones.(改成否定句)
问题描述:
In the past ,all of the buses were double-decker ones.(改成否定句)
答
In the past ,all of the buses were not double-decker ones
在系动词后加not, 因为有all , 为部分否定
全部否定为:
In the past ,noneof the buses weredouble-decker ones
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