do more exercise为什么不加s
不可数名词加s，其意义会有变化noise作为不可数名词，不加s时指噪声，喧闹声，杂声e.g. make some noise躁起来 don't make a/any noise别出声加s，noises，意为想法，说法，一般用在以下搭配中make adj. noises说…的话make all the right noises随声附和make noises about doing sth.考虑做某事make noises about sth.（贬义）常讨论某话题noises off幕后音总结自朗文当代高级英语词典。