我在刷牙英语

I'm brushing my teeth.为什么?因为原句是sb. be brushing sb.'s teeth.你难道刷别人的牙齿吗?

英文原文：I am brushing my teeth.英式音标：[aɪ] [em] [ˈbrʌʃɪŋ] [maɪ] [tiːθ] . 美式音标：[aɪ] [ɛm] [ˈbrʌʃɪŋ] [maɪ] [tiθ] .

I. am. brush teeth

i am brushing my teeth

I am brushing my teeth.