we are gong ying to see you in three weeks.（改为第一人称单数句）

we are gong ying to see you in three weeks.（改为第一人称单数句）
He is going to tell you something about Lily(改为过去时句子）
He——you something about Lily yesterday.
Lucy is piaying the piano(改为将来时句子）
Lucy ___ ___ --___ __the piano.
I ate _a banana__the piano.(就划线部分提问）
—— —— you___yesterday?
There are two letters from China.(改为一般疑问句）
—— —— —— ——from China?