Question

have a dinner 还是have dinner 同问是have lunch 还是have a lunch？

那是have a good lunch还是 have good lunch

Answer 1

吃早中晚餐不用任何的冠词 所以have dinner have lunch 正确

追问

那是have a good lunch还是 have good lunch

追答

have a good lunch 如果具体说吃了一顿丰盛的午餐 就加不定冠词 像刚才那样 就说吃饭就不加 和汉语比较一下 用法一样 例如我吃午饭了 我午饭吃了一顿大餐

Answer 2

have dinner
have lunch

追问

那是have a good lunch还是 have good lunch

追答

是have a good lunch
区别：（三餐饭的前面不用冠词）即：have breakfast/lunch /dinner/ supper
但have a good lunch意思是：吃了一顿丰盛的午餐

Answer 3

木有a

追问

那是have a good lunch还是 have good lunch