EX1 Chuyển các câu sau sang phủ định nghi vấn nếu là nghi vấn hay phủ định rồi thì đỏi ngược lại
I am at home nowMy name is NobitaThey are from Chinathere is a pen on the deskThat is my pen The teachrs are in the yardHow old are you ?Is your book ?I am 20 years oldMy father and mother is teachrsThe cat is in the tableMy mther is a nurseAre you a studentThere are your people in my familyWe is in EnglandIt is Monday todayThere are your chairs in the kitchenNam and Bao are studentsThe is a T.V and a sofa in the living roomMr Ba is a warker. He is very tall