Giúp mình với mọi người ơi!

- I left school because of my hard life at the time.

-> WHY did you leave school?

- The train was late because the fog was thick.

-> WHY was the train late?

- They’ll leave early because the distance is very long.

-> WHY will they leave early?

- She likes him because he is kind.

-> WHY does she like him?

- The pupil understood that mathematical problem very well because he explained it clearly.

-> WHY did the pupil understand that mathematical problem very well?

Why + trợ động từ + S + V + O?

` color[blue][#xedien] `