they复数

they复数 they的复数形式 They have的复数形式是They shelf (复数) they(反身代词) who're they的复数 They are our good friends改为复数 They are bus drivers.改为复数形式 are的复数是什么,是they吗? 名词复数用it/they?如题 they are pens改为复数句 He’a policeman 改成复数,They Are they your pens? 单复数互换 英语主语顺序（复数)(we you they) 复数主语they后面什么词+S clean的动词hall复数that is (they)dog I We You He She They的人称复数 英语复数变单数的句子They are English teachers. man doctor 的复数是什么They are ( ).(man doctor)