Students left the classroom as soon as possible. 这句话为什么这么说 ?

The students who have finished the work left. The students have left the school改成一般疑问句 The students left the classroom after they said goodbye to their teacher(句意不变) A few days__,the students left the school.A afterB laterC lateD before All the students think the picture on______is the bestA left B right C the middle D the right Many students didn't realize the importance of study__they left school Students left the classroom as soon as possible. 这句话为什么这么说 ? left the the students were writing busily when miss Brown went to get a book she ___ in the office.这句中填had left,为什么不是left呢? 这句话为什么有两个谓语?After class was over,the students soon left the classroomwas是谓语,left也是谓语,为什么会酱紫? I found this book when Icame to the classroom.It must must have been left by one the students the students---------,---------they did not stop climbing 怎样做Chen Yu_______,__________he could not catch the bus before it left. many students did not realize the importance of study ___they left school.填什么?when until as after Many students didn't realize the importance of study__they left school.A.when B.untilC.asD.sfter Classes______ ,the students left for home without delay.选项:a、were overb、 being overc、 are over d、 over Students must obey all the r____ of their schoolsYou can't turn left now,you are making a w____ thrn. -----------the windows and the door,the students left the room.A.Being closed B.Closed C.Having closed D.To close the teacher asked the ___________ students from the left to answer the question(four)麻烦解释一下RT...the不应该是+序数词么,但是为什么后面又有students呢.