`2.`When did you learn French ?
`→`How long is it since + S + V2/ed ?
`=`When + did + S + V ?
`3.`I study English so as to improve her knowledge.
`→`S + V + in order/so as + (not) + to + V…
`4.`A bunch of flowers has been given to her.
`→`Bị động với HTHT : S + have/has + been Vpp + (by O)
`5.`Is this the first time you have gone to school late?
`→`Have/Has + S + Vpp + before ?
`=`Is this the first time + S + have/has + Vpp ?
`6.`He was delighted that his aunt sent him a letter.
`→`S + be + so + adj + that + S + V
`7.`Chris asked Mary if/whether she realized what time it was.
`→`Câu hỏi Yes/No : S + asked +(O)/wanted to know/ wondered + if/whether + S + V(lùi thì)
`8.`Lan didn't remember her birthday and neither did I.
`→`forgot = didn't remember : quên
`→`Cấu trúc : S + didn't + V + neither + did + S
