$\text{1.}$ Lan doesn't swim as fast as I do.
$\text{→}$ ở đây có 2 trợ V: doesn't và do ⇒ Lan doesn't và I do
$\text{→}$ sau trợ V là V ⇒ doesn't swim
$\text{→}$ có as ... as ⇒ as fast as
$\text{2.}$ The people of Viet have the largest number.
$\text{3.}$ Any nomadic child can ride a horse.
$\text{→}$ nomadic: dân du mục ⇒ nomadic child
$\text{→}$ can + V ⇒ can ride
$\text{4.}$ My parents ban me from watching TV too much.
$\text{→}$ ban sb from doing sth: cấm ai làm gì
$\text{5.}$ Farmers depend heavily on the weather.
$\text{→}$ depend on: phụ thuộc vào
$\text{→}$ heavily là adv ⇒ trước nó là V