用所给动词的正确形式填空
1.Father ( ) still ( ) (sleep) when I （ ） (get) up yesterday morning
2.Grandma （ ） （cook) breakfast while I ( ) (wash ) my face this morning
3.Mother ( ) (sweep) the floor when I （ ）（leave) home
4.The students ( ) (have) a biology class when the visitors ( ) (come)
5.The driver （ ） （drive) home when it ( ) （rain) last night
6.Some students from Class Four ( ) (pay) basketball when l ( ) （see) them on the playground
1.Father was still (sleeping) when I （ got ）up yesterday morning
2.Grandma （ was cooking) breakfast while I (was washing) my face this morning
3.Mother (was sweeping) the floor when I （ left ) home
4.The students ( were having) a biology class when the visitors (came )
5.The driver （ was driving) home when it (rained ) last night
6.Some students from Class Four ( was playing) basketball when l ( saw ) them on the playground.
基本上要注意的几点是：1 时态，这个可以看句子里的提示语，ps:最后一句没有比较明显的提示语，应该都可以用。2.主语的单复数，像是第三句就要用were。3.要记住这些词的过去时态形式。4.一般来说when后面用过去式一般式，while后面用be doing形式。
was sleeping got
was cooking was washing
was sweeping left
are having comes/were having came
was driving rained
were playing saw