$35$ `:` The ice is hard enough for us to go on skiing.

`-` S `+` be `+` adj `+` enough `+` ( for sb ) `+` to `+` V_inf `+` O.

$36$ `:` Why did Hoa go to school this morning ? Because she watched TV late last night.

`-` Why `:` Vì sao

`->` Why dùng để hỏi nguyên nhân

`-` Because `:` Bởi vì

`->` Because dùng để chỉ nguyên nhân

$38$ `:` Minh's friend advised him to spend more time on pronunciation.

`->` Advise sb to `+` V_inf `:` Khuyên ai làm gì đó

$39$ `:` My older brother used to ride his bike to school, but now he doesn't.

`->` Used to `+` V_inf `:` Từng làm gì đó

=>
35. The ice is hard enough for us to go on skiing.
-> be adj enough (for sb) to V : đủ...để
36. Why did Hoa go to school this morning? Because she watched TV late last night.
-> why : tại sao
-> because : bởi vì
38. Minh's friend advised him to spend more time on pronunciation.
-> advise sb to V : khuyên ai làm gì
39. My older brother used to ride his bike to school, but now he doesn't.
-> used to V : đã từng