Linda thinks it's easy to write Chinese words. （改为否定句）
Linda it's easy to write Chinese words.
This volleyball must belong to Carla．（改为否定句）
This volleyball Carla's．
Tom has been to the US before．（改为否定句）
Tom to the US before．
Li Ling is good at writing poems．（改为否定句）
Li Ling good at writing poems．
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