he cleand his shoes一般疑问句,否定句,以when开头的特殊疑问句

问题描述:

he cleand his shoes一般疑问句,否定句,以when开头的特殊疑问句

疑问 :did he clean his shoes?
否定:he didn't clean his shoes.
when did he clean his shoes?

Did he clean his shoes?
He didn't clean his shoes.
When did he clean his shoes?