-午安! 你好嗎?
-午安! 我很好。我有三門課要上
-什麼課?
-中文課. 昨天我們沒有課,今天我們有課要上。
-哈哈! 今天我一門課都沒有
Title:今天我有三門課
門=a 課=Class
Like "a" in sentence ,I have a sentence.In chinese ,we don't type "s"or"es"after words.
I have a chinese class=我有一門中文課
I have three chinese classes=我有三門中文課
I
Chinese grammar is simple than English .