I used to swim.(改为否定句） I＿ ＿ ＿swim.I＿ ＿ ＿swim.

I used to swim.(改为否定句） I＿ ＿ ＿swim.I＿ ＿ ＿swim. He used to swim in the river改为一般疑问句 She likes to swim in the sea.改为否定句 I live on the twelfth floor.改为一般疑问句 I used to play computer games.改为一般疑问句并作否定回答 I used to live in a small vliiage with his grandma改为否定句 I used to eat too many sweets.(改为否定句)I___ ___ ___eat too many sweets. I used to play sports in the afternoon.（改为一般否定句） I can swim.改为一般疑问句,作否定回答 I'm not sure he can swim 改为否定句 I think chickens can swim.改为否定句：I ( )think chicken can not swim. I used to swim.的 to swim 是什么语?有助于回答者给出准确的答案 I think the girl can swim.(改为否定句) I____think the girl____ swim. I used to watch a lot of TV(改为否定句)I did’t watch too much TV（）（） Tom used to be really quiet[改为否定句 she used to watch TV last year.改为否定句 she used to be a history teacher 改为否定句 She used to be a history teacher改为否定句 My mother used to play tennis.(改为否定句）