短语讲解：

1. His head was shot off.

shoot off 打掉; 炸掉; 放枪
例句：Children like to shoot off firecrackers in the Spring Festival.
孩子们喜欢在春节时放鞭炮。

2. It was in front of the rider, resting on the horse.

in front of 面前; 在…前面; 当着…的面
例句：A doctor has the title 'Dr' in front of his name.
医生的名字前有“Dr”这个称呼。

3. He saw the man pick up his head and throw it with a powerful force.

pick up 捡起; 接载; 学会
例句：I'd really like to pick up Grandpa at the railroad station.
我真想去火车站接爷爷。

4. He said he was sure he saw Ichabod there.

be sure 确信; 诚然; 有谱儿
例句：It was worth a thought, to be sure.
真的，这确是一件值得注意的事情。