you should see a dentist when you have a toothache .变特殊疑问句

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you should see a dentist when you have a toothache .变特殊疑问句
you should see a dentist when you have a toothache .变特殊疑问句

you should see a dentist when you have a toothache .变特殊疑问句
这得看划线部分
see a dentist 应为 what should you do when you have a toothache
when you have a toothache 应为 when should you see a dentist

What should you do when you have a toothache?