4. We were camping by the river when we heard an emergency warning of a flood.

- QKTD when QKD

-> Diễn tả hành động đang xảy ra thì có một hành động khác chen vào.

5. We often video call to share moments of our life together.

- Often: HTD -> S + V(s/es) + O.

- Share sth to sb: Chia sẻ cái gì với ai.

6. Duong was making a video call at 3 o'clock yesterday afternoon.

- At + giờ cụ thể

- At 3 o'clock yesterday afternoon: Mốc thời gian cụ thể trong quá khứ -> QKTD

- S + was / were + V - ing + O.

7.  I think in the future, we can communicate via hologram.

- Can + V - inf: Có thể làm gì.

8. Robots will do most household chores in 50 years.

- In 50 years: TLD

- S + will + V - inf + O.

`4.` We were camping by the river when we heard emergency of a flood

`-` When + S  + V2/ed + O, S + was/were + V_ing + O

`->` Diễn tả hành động đang xảy ra thì có hành động khác chen vào

`5.` We often make video calls and share moments life together

`-` HTĐ: `(+)` S + V(s/es) + O

`6.` Duong was making a videa call at 3 o'clock yesterday afternoon

`-` at 3 o'clock yesterday afternoon `-` QKTD

`-` QKTD: `(+)` S + was/were + V_ing + O

`7.` I think in the future we can communicate via hologram

`-` S think + (that) + S + will +  V_inf + O

`-` can +V_inf : có thể làm gì

`8.` Robots will do most of household chores in 50 years

`-` in 50 years `-` TLĐ

`-` TLĐ: `(+)` S + will +V_inf + O