$1$. If i were you, i would study harder

`->`Câu đk loại 2: If + S + Ved/2, S + would/could + V-inf

$2$. Because he was lazy, he failed the exam last month

`->`Because of = because: bởi vì

`->`Beacause + S + V, S + V

$3$. I have learnt English since i was a child

`->`Đây là câu khẳng định thì HTHT: S + has/have + Ved/3 + since + quãng thời gian

$4$. A supermarket has just been rebuilt here

`->`Câu bị động thì HTHT: S + has/have + been + Ved/3 + by O
$5$. Her voice is so soft that it is impossible for me to hear it.

`->`Cấu trúc "so...that..." ( quá…đến nỗi… ): S + tobe/V + so + adj/adv + that + S  + V

VII. Rewrite the sentence without changing its meaning.

1. If I were you, I would study harder.

=> Điều kiện loại 2: S+ V( simple past), S+ would/ could/might+...Vinf

2. Because he was lazy, he failed the exam last month.

=> Because (bởi vì) + S+ V+ O, S+ V+ O

3. I have learned English since I was a child

=> Hiện tại hoàn thành: S+ have/ has+ Ved/ V3

4. A supermarket has just been rebuilt here

=> Câu bị động ở hiện tại hoàn thành: S+ have/has+ been+ Ved/ V3+ (by+ O )

5. Her voice is so soft that it is impossible for me to hear it.

=> S+ to be+ so+ Adj+ that+ S+ V: quá.... đến nỗi mà