`1)` You had better obey traffic rules as it is dangerous not to.

`->` S + had better + V-inf ... : ai tốt hơn hết là nên làm gì

`2)` The price of this bike is different from that bike by `200,000` VND.

`->` be different from sth: khác với cái gì

`->` có `200,000` VND vì "this bike" giá `800,000` VND `-` "that bike" là `600,000` VND (trừ đi)

`3)` Visitors are often excited about the Carnival Festival.

`->` S + be + trạng từ chỉ tần suất + adj/adv ...

`->` excited about sth: hứng thú với cái gì

`->` visitors là số nhiều `=>` are

`4)` Dense population will have an effect on the quality of life in a country.

`->` S + will + V-inf ...

`->` have an effect on sth: có ảnh hưởng lên cái gì

`5)` Their summer holiday lasts three months.

`->` S + V-s/es + ...

`->` last + time: kéo dài bao lâu

`->` their summer holiday là số ít (chỉ có `1`) `=>` chia last thành lasts

@magnetic

`1,` You had better obey traffic rules as it is dangerous not to

`-` had better + V-inf (phr) `=` should : nên

`2,` The price of this bike is different from that bike's price, which is 600,000 VND

`-` be different from (phr) : khác với

`3,` Visitors are often excited about the Carnival Festival

`-` be excited about (phr) : hứng thú với

`4,` Dense population has an effect on the quality of life in a country

`-` to have effect on (phr) : có ảnh hưởng đến

`5,` Their summer holiday lasts three month

`-` to last (v) : kéo dài

`#4T`