coughed是cough的过去式。

v.咳嗽;(从喉咙或肺中)咳出;突然发出刺耳的声音;

第三人称单数coughs 现在分词coughing

过去分词coughed 复数coughs

Try gargling with salt water as soon as a cough begins

一开始咳嗽就马上试着用盐水漱口。