Did she do some reding yesterday?为什么前面不用is,而是用助动词?

Did she do some reding yesterday?为什么前面不用is,而是用助动词? DID she do some reading yesterday 和 Was she doing some readi what did she do last weekend?do为什么不用does Did she do some reading yesterday和was she doing somereading 这句话为什么用did 不用do What did Alice do yesterday evening?She ____(cut)some rice o She was ill in hospital yesterday为什么hospital 前面不用the She did some washing yesterday.变成否定句时是否需要将some 改成 any?因为do s The boy _______ we saw yesterday is john's brother .前面为什么不用t do,did,does助动词和be,is,are,were,was是动词有什么用 什么时候用be动词（is）和助动词（do）?（包括区别）什么时候两者不用? she did some reading yesterday改为一般疑问句.