`18`. It has been raining for 30 minutes.

$\longrightarrow$  S + have/has + P2 / been Ving+ for / since 

`19`. Your house isn't the same as mine

$\longrightarrow$ so sánh sự giống nhau ta dùng the same as 

$\longrightarrow$ S + V + the same + as + O

`20`. Hai Phong isn't as large as Hanoi 

$\longrightarrow$ S + V + as + Adj/Adv + as + O 

`21`. I want to eat ice creams, but I have a sore throat 

$\longrightarrow$ but đứng giữa câu và đc ngăn cách bằng dấu phẩy 

$#Hoctot$ 

`18.` It has ranied for 30 minutes 

S + has/ have + V_ed/ V3 + for + khoảng thời gian

`19.` Your house isn't the same as mine

$S_{1}$ + be + the same as + $S_{2}$

`20.` Hai Phong isn't as large as Hanoi

$S_{1}$ + be + (not) + as + adj + as + $S_{2}$

`21.` I want to eat ice creams but I have a sore throat

S + V + but + S + V (Hai mệnh đề đối lập nhau)