`19`. Because of the beautiful weather, we spent the whole day in the garden yesterday.

`-` Because of + N/Ving/Nphrase, S + V: Bởi vì...nên..

`=>` Chỉ nguyên nhân

`20`. The test is too easy for them since they could do it in `30` minutes.

`-` S + V + since + S + V: ...bởi vì..

`-` S + tobe + too + adj (for sb) + toV-bare: quá..để làm gì..

`21`. If you don't do exercises, you'll have fat in your food.

`-` Đk loại `1`: If + S + do/does + not + V-bare, S + will/can/may + V-bare

`22`. Hai suggested that Thang should install a burglar alarm in his house.

`-` S + suggested + that + S + should + V-inf: ai đó đề nghị ai đó nên làm gì..

Trans: Hải đề nghị Thắng nên lắp thiết bị báo trộm trong nhà.

`19.`

`⇒` Because of the beautiful weather , we spent the whole day in the garden yesterday

`to` Because of + N/V_ing , S + V

`20.`

`⇒` They do the test in 30 minutes since it is very easy

`to` since = because : bởi vì , vì

`to` S + V + since + S + V + ...

`21.`

`⇒` If you do exercise , you will not/won't have fat in your blood

`to` If + S + V(HTĐ) , S + can/may/might/will + (not) + V ...

`22.`

`⇒` Hai suggested Thang should install a burglar alarm in his home

`to` Suggest + S + should + Vo : Đề nghị ai nên làm gì