1、中央电大开放英语(1)形成性考核册答案 1、请写出下列名词的复数形式。Parent photo bus life half child woman toothParentsphotosbuseslives haves children women teeth2、频度副词often,always,sometimes等在句中的位置是有规律的,请写出这些规律,并各举一个例句。(1)在动词tobe之后:AreyoualwaysathomeonSunday? (2)在实意动词之前: IsometimesgotoLondon. (3)在含有助动