stomach ache 单词为何要分开earache toothache backache这些单词后缀都是和前面的单词合在一起的,为什么stomach ache 要分开小学的英语书上就这么写的，

stomach ache 单词为何要分开earache toothache backache这些单词后缀都是和前面的单词合在一起的,为什么stomach ache 要分开小学的英语书上就这么写的， stomach ache分开和合起来都可以吗? stomach ache可数吗 stomach ache 的音标 stomach ache怎么读快呀急 stomach ache怎么读 up out school ache with bag stomach ball foot side 组成单词连线 stomach ache与stomachache有什么区别 stomachache stomach ache 有什么区别 英语 ------- your mother ------- a stomach ache? 英语 ------- your mother ------- a stomach ache? he usually has a stomach-ache（改为否定句） he_________uhe usually has a stomach-ache（改为否定句）he_________usually_________a stomach-ache. 重新排列单词组成句子you a ache have stomach got_______________________________has headache Lucy not a got___________________________are a you girl lovely______________________has he got cold a__________________she got a has cough___________ stomachache 还是stomach-ache?应该是两种都可以吧? 用have l got stomach ache a造句 stomach ache,fever,cold,cough的音标是什么? wrong number (中文)...stomach ache(中文)open your mouth(中文) 加ache的单词,越多越好