动词saw的过去式和过去分词形式
The speaker sawed the air as he cried loudly. 发言者一边挥舞手臂一边大声叫喊。
The swindler really sawed through a patient's bone. 这个骗子还真的锯断了一个病人的骨头。
He sawed the dead branches off. 他把那些枯枝锯掉了。
She sawed off a dead branch. 她锯掉一根枯枝。
