37. The test was too difficult for them to do. → The test was ……………………………………………………………………………………….. 38. We often spend 30 minutes reviewing our lesson before class. → It often takes ………………………………………………………………………………………. 39. The man asked me, “Could you please bring me some coke?” → The man asked me ……………………………………………………………………………….. 40. You should practice English frequently. → You ought …………………………………………………………………………………………

`37.` The test was so difficult that we couldn't do it.

`⇒` S + tobe + so + adj + that + S + V.

`-` Cấu trúc :"so...that" (với động từ tobe): quá đến nỗi mà...

`38.` It often takes us 30 minutes to review our lesson before class. 

`-` S + spend/ spends/ spent + khoảng thời gian + V_ing

`⇒` It takes/took + O + khoảng thời gian + to + V_inf (Ai đó mất bao nhiêu thời gian để...)

`39.` The man asked me to bring him some cokes.

`-` S + asked/told/advised/ordered/wanted/warned + sb + (not) + to V-inf

`40.` You ought to practice English frequently.

`-` S + ought to + động từ nguyên mẫu hoàn thành