將單詞重組成句（注意時態(tài)）
1.English , we , study , for 7 years.
2.my mother , ill , for two weeks.
3.The door , close , since they moved away.
4.The bridge , build , since 2006.
5.His parents , sleep , when he came home last night.
6.He , wait , for one hour , when the bus fmally came.
7.He , study piano , before he went to America.