My brother showed his stamps to his classmates (last week) 改成否定句,一般疑问句,对括号提问

问题描述:

My brother showed his stamps to his classmates (last week) 改成否定句,一般疑问句,对括号提问

My brother didn't show his stamps to his classmates last week
did your brother show his stamps to his classmates last week?
when did your brother show his stamps to his classmates