1-Linda said she thought she had better stay at home and do her homework that day

2- Na's father said he would be back next sunday and buy her a new doll

1.Linda said:"I think I had better stay at home and do my homework today"

-> Linda said she thought she had better stay at home and do her homework today that day

vì I think là thì hiện tại đơn nên chuyển sang câu tường thuật là

`S-{1} + said + (that) + S_{2} + V_{2/ed}`

2.Na's father said:"I will be back next Sunday and buy her a new doll"

-> Na's father said he would ba back next Sunday and buy her a new doll

vì câu có will + V chuyển sang câu tường thuật là:
`S_{1} + said + (that) + S_{2} + would + V

lưu ý : that có thể điền vào cấu trúc câu hay không cũng đc

mong ctlhn ạ~~