didn't visit
Did go
Were busy
What did do
Who did play
哪里不懂欢迎追问，请放心采纳，谢谢
didn't visit
did go
were busy
what did do
who did play
didn't visit
did,go
Were ,busy
What,did ,do
Who/whom,did,play
都是过去时有用法.除了第三题含有Be动词外,其它都是实义动词,问句或否定句都要加个助动词did.原来的过去时就还原成动词原形.
第五题对宾语提问,在句首可以用whom,也可以用who, 如果把with提前的话,只能用whom.
1didn't visit
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