114.I heard he _______ the piano in the room last night.为什么是答案是 played

问题描述:

114.I heard he _______ the piano in the room last night.
为什么是答案是 played

句子后头有个last night,表示此句子是过去式.英文语法中,若句子是过去式,句子里的动词就得改为过去式.所以,play是动词,就变成played,就如hear变成heard一样.p.s.如果动词前面有一个to字,动词就必须保持原形,不能改为...