Marry said " I am having a science test tomorrow" 

`=>` Marry said that she was having a science test the next day

`@` Lùi một thì: thì hiện tại tiếp diễn lùi xuống quá khứ tiếp diễn

`@` tomorrow `=>` the next day

`@` chuyển ngôi: I `=>` She

`@QnG`

`3`. Marry said that she was having a science test the day after.

`@` Câu trần thuật ~ gián tiếp:

`-` S + said/told/said to + (O) + (that) + S + V(lùi thì)

`-` Lùi thì: HTTD `->` QKTD (was/were Ving)

`-` Đổi ngôi: I `->` she

`-` Tomorrow `->` The next day/The following day/the day after.