`1.` He found an old watching under the sofa.

`-` Khẳng định : S + V2/ed +.......

`2.` What time do you go home after school ?

`-` What time + aux + S + V + .... ? : hỏi về thời gian

`3.` She only eats fruits for breakfast.

`-` Khẳng định : S + ( trạng từ tần suất ) + V(s/es) + ..... 

`4.` Are there any could drinks in the fridge?

`-` Nghi vấn : Are there + N nhiều + .... ?

`5.` All the students must go to school at 7 o'clock.

`-` S + must + V-inf : phải làm gì 

6. He found an old watching under the sofa.

  Because : Affirmations --> Subject + V(ed/3) + Object.

7. What time do you go home aftter school?

  Because :Question --> Wh_question + do/does + Subject + V(inf) + O ?

8. She only eats fruits for breakfast.

  Because: Affirmations --> Subject + Adverbs of frequency + V (inf/ s,es)

9. Are there any could drinks in the fidge?

  Because: Tobe + there/these/those+  any/many + could + N + O ?

10. All the students must go to school at 7 o'clock.

  Because: Subject + must + V (inf/s,es) + O .