cough发f的音，是字母组合gh发/f/音。
He coughed a little and cleared his throat .他咳了一下，清了清喉咙。
I have to cough up money to get the car fixed .我只好花钱去修车。
She was given a needle for whooping cough .她因患百日咳打了一针。
That cough sounds as if it is getting worse .患的咳嗽像是更重了。
A coughing fit racked her whole body .她一阵咳嗽全身都十分难受。
