How old were you when you first stated playing the piano中,为什么stated要用过去式,不是有were了吗?

初级英语,How old were you when you how to run?whe初级英语,How old were you when you how to run?when did you learned how to ride a bike?have you ever gone camping?how long will she be in shanghai请问这几句是什么时态? 英语作文how old were you when ... Could you tell me how old you _(are,were) how old were you started to learn English? how old were you started to learn English? How old did you say you were这句为什么是were不是are how old were you when i first saw you (改同义句） how old were you when i saw you ___ ___ ___ ___?急、、 when,how,were,you,old,you,went,London,to .(连词成句) first,how,were,you,old,you,went,London,to连词成句 How old were you when you started learning English? 要怎么回答? how old are you “How old are you? how old are you How old are you? :How old are you? How old are you? twins/how/them/were/the/when/first/saw/old/you连词成句 翻译3句,英文翻译成中文how old you were where you were living at the time what you were doing during this stage