Giúp em vs ạ em cmon

`1.` They said that they could spend part of their budget on research and development.

`-` can `->` could

`-` Cấu trúc: modal verb + V(nguyên thể)

`2.` The reporter said that she had donated money to establish that pharmeceutical laboratory.

`-` Hiện tại hoàn thành `->` Quá khứ hoàn thành

`-` this `->` that

`3.` He said that Thomas Edison had been born in 1847 and had died in 1931.

`-` Quá khứ đơn `->` Quá khứ hoàn thành.

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Câu tường thuật:

S + said + (that) S + V(lùi thì)