句型转换
They have been in China for nine years.（对划线部分提问）
______________ ______________ have you been in China?
Jim sent me a few snow globes.（改为同义句）
Jim _____________ a few snow globes _____________ me.
Leo has been teaching in China for two years.（改为一般疑问句）
_______________ Leo ______________ teaching in China for two years.
He rides his bike every day.(用at this time yesterday改写)
He ______________ _______________ his bike at this time yesterday.
Tom has been making kites since four years ago. (改为同义句)
It is four years ________________ Tom _______________ to make kites