`4.` That book is more boring than this book.

$boring><interesting$

$S_1+tobe+more+adj+than+S_2$

`5.` Your house is newwer than my house.

$new><old$

$S_1+tobe+adj-er+than+S_2$

`6.` Hoa is the most beutiful person in my class.

$S+tobe+the+most+adj+O+...$

`7.` The stadium is behind the restaurant.

$behind><in$ $front$ $of$

$S+tobe+prepositions$ $of$ $place+O$

`8.` My class has `20` student.

$S+have/has+...$

`4.` That book is more boring than than this book 

$S_{1}$ + be + adj-er/ more adj + than + $S_{2}$ 

`5.` Your house is newer than my house

$S_{1}$ + be + adj-er/ more adj + than + $S_{2}$ 

`6.` Hoa is the most beautiful in my class

S + be + the + adj-est/ most adj + in/ all of/ of ...

`7.` The stadium is behind the restaurant

in front of (đằng trước) >< behind (phía sau)

`8.` My class has 20 students 

`-` There is/ are + số lượng + noun + in ...

`-` S + have/ has + số lượng + noun