牙刷用英语怎么说怎么写

牙刷用英语叫做 toothbrush。
toothbrush 来源于英语单词 tooth 和 brush，tooth 意为牙齿，brush 意为刷子，所以 toothbrush 就是用来刷牙的刷子。
例句：
I brush my teeth with a toothbrush and toothpaste every morning.
我每天早上用牙刷和牙膏刷牙。
Don't forget to replace your toothbrush every three months.
别忘了每三个月更换一次牙刷。
The toothbrush has soft bristles that gently clean your teeth.
这款牙刷有柔软的刷毛，能温和地清洁牙齿。