`4.`

`1.` He washes his car every Sunday afternoon

`@` HTĐ: `(+)` S +  V(s/es) + O

`-` he + Vs/es

`2.` Unless I have a quiet room, I can't  do my homework

`-` Unless `=` if not

`@` Điều kiện loại 1:

If + S +  V(s/es) + O, S +  will +  V_inf + O

`3.` Lan is the most intelligent in her class

`@` SSN  với TTD:
S +  tobe + the most +  adj +  ...

`4.` The book I gave him yesterday which is very interesting

`-` which : cái mà `-` vật, động vật

`-` N(thing) + which +  V + O

`5.`

`1.` This film was really interesting

`@` QKĐ: `(+)` S +  was/were +  N/adj

`Ex4.`

`1.`

`⇒` He washes his car every Sunday afternoon

`to` S + V(HTĐ) + ...

`2.`

`⇒` Unless I have a quiet room I can't do my homework

`to` Unless `=` If not

`to` If + S + V , S + can/may/might/will + (not) + V + ...

`3.` 

`⇒` Lan is the most intelligent student in her class

`to` SS nhất với "long_adj/adv" : S + tobe/V + the most + long_adj/long_adv + N + ...

`4.` 

`⇒` The book which i gave him yesterday is very interesting

`to` Which : Mệnh đề quan hệ chỉ vật - Làm chủ ngữ/tân ngữ

`Ex5.`

`1.`

`⇒` This was really intersting film

`to` S + tobe + adj + N