Bài `4` :
`1.`They decided to leave soon.
(-) They didn’t decide to leave soon.
(?) Did they decide to leave soon ?
`2.`There were many homeless people here ten years ago.
(-) There were not many homeless people here ten years ago.
(?) Were there many homeless people here ten years ago ?
`3.`Tom’s grandfather used to be a soldier.
(-) Tom’s grandfather didn’t use to be a soldier.
(?) Did Tom’s grandfather use to be a soldier ?
`4.`My teacher started teaching here 6 years ago.
(-) My teacher didn’t start teaching here 6 years ago.
(?) Did your teacher start teaching here 6 years ago ?
`5.`The train arrived late yesterday.
(-) The train didn’t arrive late yesterday.
(?) Did the train arrive late yesterday ?
`6.`There was anything left in the fridge.
(-) There wasn’t anything left in the fridge.
(?) Was there anything left in the fridge ?
`7.`Many rich people donated money for this volunteer program.
(-) Many rich people didn't donate money for this volunteer program.
(?) Did many rich people donate money for this volunteer program ?
`8.`Lan was absent from class 2 days ago.
(-) Lan wasn't absent from class 2 days ago.
(?) Was Lan absent from class 2 days ago ?
`⇒`Cấu trúc :
Câu khẳng định : S + V2/ed or S + was/were
`→`Câu phủ định : S + didn't + V or S + was/were + not + V
`→`Câu hỏi :
+) Did + S + V ?
+) Was/Were + S + V ?
