新概念英语一册L139-140(15)

现在完成时的否定疑问句，表强调GT: Hasn't Mary told you? She invited Charlotte and me to dinner this evening.

I said I would be at your house at six o'clock,but the boss wants me to do some extra work.“是否” I'll have to stay at the office. I don't know when I'll finish. 一般疑问句变宾语从句， 宾语从句 用 if 引导宾语从句 Oh, and by the way,

= arrive at your house 加班

顺便问一句

陈述语序

my wife wants to know if Mary needs any help.

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