time 具体化的用法,可以是可数名词。请看《朗文词典》的释义:
因此,我理解two good times 可以表示两段快乐的时光,只是你假设的这个语境,在一般英语教材中出现频率不如have a good time高,所以比较少见。但在图书语料库中,这样的用法还是很多的。请看外刊例句:
在 have a good/great/nice/hard time 这个表达方式中,time 是可数名词,但是只能用单数。例如:(1) I /We have a good time every day. (2) I / We / He had a good time yesterday and the day before yesterday. 不能说:I / We / He had two good times yesterday and the day before yesterday.