nine hundred people were present in the meeting的否定句和一般疑问句是?对

nine hundred people were present in the meeting的否定句和一般疑问句是?对 改否定句和一般疑问句there were about nine hundred people at the concer There were about nine hundred people in the meeting hall. There were about nine hundred people at the concert.(改否定句,一般 There were about nine hundred people at the content.改成否定句!一般 把There were about nine hundred people at the concert变成一般疑问句和 there were about nine hundred students in my school改为否定句和疑问句 there were about nine hundred people at the concert(一般疑问句） There were about nine hundred people at the concert 改否定句 The There were about nine hundred people at the concert 改疑问句 The The photos were taken in Japan ① 改为否定句 ②(改为一般疑问句,并做肯定和否定回答) There were three students in the chassroom.否定句：一般疑问句：肯定,否定回答