mistake star candy trouble free time 这几个单词可数吗?

mistake star candy trouble free time 这几个单词可数吗? candy candy Candy mistake He could't stand ___such a mistake Don't mistake this crocodile for a I don’t know my feel ,mistake She didn’t have _____cotton candy .A.any B.some Don't worry.This mistake is no快!Don't worry.This mistake is not very (). star star Star Star star candy在什么时候用复数,什么时候用单数?“I haven't got any candy.”一句中为什么candy不用变成candies?（有例句的话更好） for mistake和by mistake各表示什么意思?遇到个选择T，有两个个选项 for mistake和by mistake you can't make the same mistake again.[改为祈使句】------ -------- the same mistake again.