-Công thức :

(+ ) S + am/is/are + Adj/N.

( - ) S+ am/is/are + not + Adj/N.

( ? ) Am/is/are + S (+ not) + Adj/N?

-Dấu hiệu: Khi trong câu có các từ:

+Always, usually, often, frequently, sometimes, seldom, rarely, hardly , never, generally, regularly.

+Every day, every week, every month, every year,…

+Once, twice, three times,...

+A day, a week, a month, a year,...

#Sa

Công thức

(+)   He/She/It +V_s,es +O/N

      I/They/We/You + V_infi + O/N

Ex:  He playes fooball 

     We oftens go to school  everyday

(-)  He/She/It + doesn't +V_infi +O/N

     I/They/We/You + don't + V_infi +O/N

Ex:  She doesn't cook dinner

      They don't visit grandparents

(?)  Does + He/SHe/It +V_infi +O?

      Do +  They /We/You  +V_infi +O?

       Yes,S +do/does

       No,S + don't/doesn't

 Ex:  Does she go to the zoo ?

       Do they travel to Ha Long Bay?

Dấu hiệu

- always,often,usually,frequently,never,seldom,rarely,hardly,generaly,...

-everyday,everyweek,every month,evey year,....

-once,twice,three times,four times,.....a day/week/month/year