li ping cleand the classroom after class .(变为否定句)和(一般疑问句)

问题描述:

li ping cleand the classroom after class .(变为否定句)和(一般疑问句)

Li Ping cleaned the classroom after class .(变为否定句)和(一般疑问句)
一般疑问句:Did Li Ping clean the classroom after class?
否定句:.Li Ping didn't clean the classroom after class .