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→ How heavy is your son ?

$\color{black}{-}$ How + Adj + tobe + S +...?

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→ How much does this face mask cost ?

$\color{black}{-}$ How much + do/does + S + Cost ?

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→ Will you please take care of the house while we are away ?

$\color{black}{-}$ Take care of sb : Quan tâm, chăm sóc ai đó/cái gì đó

`1.` How heavy is your son?

`-` Dùng thì HTĐ

`-` WH_Question/How + is/am/are + S 

`-` Tạm dịch : Con trai bạn nặng bao nhiêu?

`2.` How much does this face mask cost?

`-` Dùng thì HTĐ

`-` WH_Question/How + is/am/are + S 

`-` Tạm dịch : Cái mặt nạ này có giá bao nhiêu?

`3.` Will you please take care of the house while we are away ?

`-` Dùng thì TLĐ

`-` Will + S + V(nguyên dạng)

`-` Take care of sb : Quan tâm/ chăm sóc ...

`@`𝚉𝚢𝚢