`1.C`

`-` Lùi thì: will `->` would

`-` ĐTCTG: this year `->` that year

`2.C`

`->` không lùi thì vì từ "tell" chia ở hiện tại

`3.C`

`-` Lùi thì: QKĐ `->` QKHT

`-` ĐTCTG: yesterday `->` the day before

`4.B;C`

`-` Lùi thì: will `->` would

`-` ĐTCTG: next week `->` the next week/the following week

`--------------`

`@`Câu tường thuật:

`-` kể: S + said/said to sb/told sb + (that) + S + V (lùi thì)

`color{red}{#lgdr}`

`1` `C` .

`-` will `->` would .

`-` this `->` that .

`2` `C` .

`-` yourself `->` myself .

`3` `C` .

`-` cancelled `->` had cancelled .

`-` yesterday `->` the previous day/the day before .

`4` `C` .

`-` our `->` their .

`-` will `->` would .

`-` next week `->` the following week/the next week .

`-----------------------` 

`@` Gián tiếp tường thuật : S + said/informed/... + O + that + S + V(lùi thì) + O .