Question 1. He couldn't go to work yesterday because he was ill.
 * Because of his illness, he couldn't go to work yesterday.

>> Because of + N >> ill: ốm là tính từ; chuyển sang danh từ sẽ là illness: bệnh. Vế sau giữ nguyên.
Question 2. We began to read this book two hours ago.
 * We have read this book for two hours.

>> Chuyển từ QKĐ sang HTHH có từ began thì bỏ began sau đó viết theo công thức thì HTHH bình thường.

>> Two hours là khoảng thời gian >> dùng for bỏ ago
Question 3. No boy in the class is as intelligent as Nam.
 * Nam is the most intelligent boy in the class

>> Dịch: Không chàng trai nào trong lớp thông minh như Nam

⇒ Nam là chàng trai thông minh nhất trong lớp
Question 4. "Would you like to drink some tea, Hoa?" Nga asked.
 * Nga invited Hoa to drink some tea.

>> Câu gián tiếp: "Would you like..., S1" S2 + asked

⇒ S2 + invited + S1 + to V...

`1`.Because of his illness , he couldn't go to work yesterday

`\rightarrow` Because of + N / N phrase + Clause : Bởi vì

`2`.We have read this book for two hours

`\rightarrow` Thì HTHT : S + have / has + V3 / PII 

`\rightarrow` Đặc điểm nhận dạng : for

`3`.Nam is the most intelligent boy in the class

`\rightarrow` So sánh nhất : S + be + the adj-est / the most adj

`4`.Nga invited Hoa to drink some tea

`\rightarrow` Invited + to V : Mời làm gì

`\text{@ TheFox}`