1"My best friend will take you to the post office" Nam said to me => Nam told me that 2 He hasn't smoked for three years => He stopped 3 My father has bought some books => Some books 4 In spite of being tired, he tried to finish his work => Although 5 I can't write to him because I don't know his address => If I

1. Nam told me that his best friend would take I to the post office

            ⇒ Cấu trúc câu trực tiếp ⇒ gián tiếp dạng tường thuật :

                   S + said/ told + (that)+ S + V (lùi thì)

2. He stopped smoking three years ago ( chuyển câu từ thì HTHT ⇒ QKĐ)

3. Some books have been bought by my father ( câu bị động thì HTHT)

                ⇒ S + have/has + been + Vpp + by O

4. Although he was tied, he tried to finish his work ( cấu trúc although)

                ⇒  Although + S + V, S + V

5. If I knew his address, I could write to him ( cấu trúc câu ĐK loại 2)

                ⇒ If + S + Vqk, S + would/ could + Vinf