throw的ing

ing形式是throwing，中文意思是v. 掷（throw 的 ing 形式），n. 投掷

The boys were throwing sticks and stones at the dog.男孩子们朝那条狗扔枝条扔石头。

He spent hours throwing a tennis ball against a wall.他花了数小时对着一堵墙扔网球。

People were booing and throwing things at them.