`41.` I don't mind helping my mum with the cooking.

mind + V-ing : ngại làm gì
`42.` Jack refused to take his brother to the swimming pool.

refuse + to Verb : từ chối làm cái gì
`43.` Sammy prefers going on a bike ride to playing board games.

prefer + V-ing/ to V: thích gì hơn gì 
`44.` Susan walks to work every day now that she lives only a few blocks from her office.

now that : bây giờ thì 

live on sth : sống bằng cái gì
`45.` You need to do proper warm-up exercises before you start your yoga practice.

Before + simple present, simple present

need to-V : cần làm gì

`41`. I don't mind helping my mum with the cooking.

`-` Be happy to do sth `=` Not mind doing sth: vui vẻ khi làm gì/không phiền làm gì.

`42`. Jack refused to take him to the swimming pool.

`-` Refuse to do sth: từ chối làm gì.

`43`. Sammy prefers going on a bike ride to playing board games.

`-` S + prefer(chia) + V-ing + to + V-ing: ai đó thích làm gì hơn làm gì.

`44`. Now that Susan lives only a few blocks from her office, she walks to work every day.

`-` Now that + S + V, S + V:  Bởi vì..

`=` Because/Since/As + S + V, S + V: Bởi vì..

`45`. You need to do proper warm-up exercises before you start your yoga practice.

`-` Need to do sth: cần làm gì..

`-` S + V + before + S + V: ai đó làm gì trước khi ai làm gì..