Chuyển các câu sau sang câu phủ định và câu hỏi.
Mẫu 1. Daisy has already phoned her mother.
(-) Daisy hasn't phoned her mother yet.
(?) Has Daisy phoned her mother ?
2.He has already arrived at the airport.
(-) ..........................................................................
(?) .....................................................................................
3. They have studied French for two months.
(-)....................................................................................
(?).................................................................................................
4. Mary has read all the new books.
(-).....................................................................................................
(?).............................................................................................................
5. My children have found their toys.
(-).................................................................................................
(?)...........................................................................................................
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