3. Ha said to his father if he could help him with his homework. (can→could)

4. Tam said to Nam that he had better learn by heart the new words every day. should→had better)

5. Nga said to her friends that she was leaving here for Hue Festival the next day. (HTTD→QKTD; tomorrow→the next day)

6. His daughter said that she would come with him as soon as she finished those grammar exercises. (will→would; HTĐ→QKĐ; these→those)

7. His mother asked not to spend too much time playing computer games. (S+said: "Mệnh lệnh thức phủ định" = S + asked not to do sth)

Xin ctlhn!

CHÚC BẠN HỌC TỐT

`3`. Ha asked his father if/ whether he could help her with her homework.

`-` Câu tường thuật: Yes/ No-question: S+ asked+ O+ if/ whether+ SVO

`-` Đổi ngôi: you `->` he

`-` Động từ lùi thì: can `->` could

`-` Tân ngữ: me `->` her

`-` Tính từ sở hữu: my `->` her

`4`. Tam said to Nam he should learn by heart the new words everyday.

`-` Câu tường thuật: Lời nói: S+ said+ to O ( that)+ SVO

`-` Đổi ngôi: you `->` he

`5`. Nga said to her friends she was leaving there for Hue festival the next day.

`-` Đổi ngôi: I `->` she

`-` Động từ lùi thì: am leaving `-` was leaving

`-` Trạng từ: here `->` there, tomorrow `->` the next day/ the following day/ the day after 

`6`. His daughter said she would come with him as soon as she finished those grammar exercises.

`-` Đổi ngôi: I `->` she

`-` Động từ lùi thì: will `->` would, finish `->` finished

`-` Tân ngữ: you `->` him

 `-` Tính từ chỉ định: these `->` those

`7`. His mother told him not to spend too much time playing computer games.

`-` Câu tường thuật: Đề nghị: S+ told+ O+ to V/ not to V