根据适当形式填空.Did you hear someone ……(cough )just now?

问题描述:

根据适当形式填空.Did you hear someone ……(cough )just now?

coughing
hear sb doing sth 听见某人在做某事
楼上在忽悠!

coughed

答案是:coughing 有这个句型:hear sb doing sth听到某人正在做某事【强调动作】

直接cough
因为Did所以用原型