1. They told us that their friends would get the award for their highest scores. - told → quá khứ ⇒ will → would

2. He said that he would go to school by bus the next day. - said → quá khứ ⇒ will → would, tomorrow → the next day

3. Phong said that he needed to learn more vocabulary. - said → quá khứ ⇒ need → needed

4. His brother told her she could use his computer that day. - told → quá khứ ⇒ can → could, today → that day

5. Mary said that she couldn't go to the movies with Nam. - said → quá khứ ⇒ cannot=can't → couldn't. "you" là "Nam" nên có thể lược bớt 

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Reported speech lùi thì như sau:

Động từ tương lai → hiện tại, hiện tại → quá khứ.

Cách định dạng thì dựa vào reporting verb như "tell", "say". Nếu ở hiện tại thì động từ giữ hiện tại, quá khứ thì lùi thì, tương lai will/can → would/could

Tomorrow → the next day, today → that day

Hướng dẫn trả lời:

⇒ Answer:

1. They told us (that) their friends would get the award for their highest scores.

(will → would.)

2. He said (that) he would go to school by bus the next day.

(will → would.)

3. Phong said (that) he need/had to learn more vocabulary.

(need → need/had to.)

4. His brother told her (that) she could use his computer that day.

(can → could).

5. Mai said (that) she couldn't go to the movies with Nam.

(cannot → couldnot = couldn't).

Giải thích:

- Công thức câu tường thuật ở dạng câu kể: S1 + said/told/replied/... + (that) + S2 + V + ...

- Khi chuyển đổi từ câu trực tiếp sang câu gián tiếp thì ta sẽ thay đổi thì (lùi về 1 thì), thay đổi trạng từ chỉ thời gian (tomorrow → the next day; today → that day ...) và đại từ.

(Lùi từ Hiện tại về quá khứ, quá khứ về quá khứ hoàn thành ...)