`21`. When do the Coho celebrate their New Year holidays?

`-` When?: Bao giờ?

`-` HTĐ: Do/Does + S + V-inf?

`22`. What is used to get water to the fields?

`-` What?: Cái gì?

`23`. Who do the Ha Nhi mainly worship?

`-` Who?: Ai?

Công thức thì HTĐ (V: thường)

S số ít, he, she, it 

(+) S + Vs/es

(-) S+ doesn't + V1 

(?) Does +S +V1?

S số nhiều, I, you, we, they

(+) S + V1 

(-) S+ don't + V1 

(?) Do + S+ V1? 

DHNB: always, usually, sometimes, often, never, seldom,....

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Các từ để hỏi (WH):

- When: khi nào

- What: cái gì 

- Who: ai

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21. When do the Coho celebrate their New Year holidays?

22. What is used to get water to the fields?

23. Who do The Ha Nhi mainly worship?

`color{orange}{~LeAiFuRuiHuiBao~}`