`1.`This house was built in 2004.

`=>`Cấu trúc bị động với thì quá khứ đơn : S + was/were (not) + Vpp + (by O)

`2.`The interview asked me when I had begun studying English. 
`=>`Cấu trúc câu gián tiếp với câu hỏi Wh- Questions : S + asked/ wondered/ wanted to know +

Wh/ How-Questions + S + V lùi thì

`-`you `->`I ( Đổi theo ngôi "me" )

`-`did...begin `->`had begun ( Lùi thì )

`3.`If he doesn't phone immediately,he won't get any information.

`=>`Unless `=` If...not... : Nếu không

- Khi chuyển từ "Unless" về "If", ta giữ nguyên một vế và trái vế còn lại.

`4.`Many students in the USA took part in different activities at recess.

`=>`participated in `=`took part in `=`joined in : Tham gia vào...

`5.`Huy advised Ba not to buy this book.

`=>`If I were you, I would (not) + V bare : Nếu tôi là bạn, tôi sẽ... ( Câu chỉ lời khuyên )

`=`S + advised + O + (not) to V_inf : Ai khuyên ai nên/không nên làm gì...

`1`. This house was built in `2004`.

`-` Câu bị động ( thì HTĐ): S+ was/ were+ Vpp+ [ by O]+...

`2`. The interview asked me when I had begun studying English.

`-` Câu tường thuật: Wh-question: S+ asked+ O+ wh-question+ SVO

`-` Đổi ngôi: you `->` I

`-` Động từ lùi thì: did you begin `->` I had begun

`3`. If he doesn't phone immediately, he won't get any information.

`-` Unless `=` If+...+not

`4`. Many students in the USA took part in different activities at recess.

`-` participate+ in `=` take part in: tham gia

`5`. Huy advised Ba not to buy that book.

`-` advice+ sb+ (not) to V: khuyên ai ( không nên )làm gì

`-` Tính từ chỉ định: this `->` that