我在敲门，你能来帮我吗？
wǒzài qiāomén ， nǐ néng lái bāng wǒma ？
I am knocking at the door, can you come help me?
他用锤子敲打钉子。
tāyòng chuízǐ qiāodǎ dīngzi 。
He is hammering the nail with a hammer.
她敲打着键盘，写作一篇文章。
tā qiāodǎ zháo jiànpán ， xiězuò yīpiān wénzhāng 。
She is typing on the keyboard, writing an article.