$\text{* Vì ở đây chúng ta sẽ có công thức của thì hiện tại hoàn thành dạng:}$

$\text{→ Công thức thì hiện tại hoàn thành có dạng:}$ 

$\text{( + ) S + have \ has + PP + O + time }$

$\text{( - ) S + have \ has + not +PP + O + time}$

$\text{( ? ) Have \ has + S + PP + O + time ? }$

$\text{→ Dấu hiệu nhận biết thì HTHT sẽ gồm có như sau: }$

$\text{⇒ just , recently , lately }$

$\text{⇒ already}$

$\text{⇒ before}$

$\text{⇒ ever }$

$\text{⇒ never }$

$\text{⇒ yet }$

$\text{⇒ for + khoảng thời gian \ since + mốc thời gian }$

$\text{⇒ so far = until now = up to now = up to the present}$

$\text{⇒ in/ for/ during/ over + the past/ last + time }$

$\text{→ Thì quá khứ đơn sẽ có dạng như sau : }$

$\text{⇒ Công thức thì QKĐ với động từ thường :}$

$\text{( + ) S + V_ed \ 2 + O + time}$

$\text{( - ) S + didn't + V_inf + O + time}$

$\text{( ? ) Did + S + V_inf + O + time ?}$

$\text{⇒ Công thức thì QKĐ với động từ tobe: }$

$\text{( + ) S + was \ were + O + time }$

$\text{( - ) S + was \ were + not + O + time}$

$\text{( ? ) Was \were + S + O + time ? }$

$\text{→ Dấu hiệu nhận biết thì QKĐ sẽ gồm có như sau: }$

$\text{⇒ yesterday }$

$\text{⇒ ago }$

$\text{⇒ last ( week ,.....)}$

$\text{⇒ in + time ( in the past) }$

$\text{⇒ the day before }$

$\text{⇒ today}$

$\text{⇒ this afternoon, this morning }$

$\text{26 I have learned Math for an hour}$ 

$\text{27 Tim has bought his report card since yesterday}$  

$\text{28 They have had this car for 10 years}$  

$\text{29 We have known each other since we were students}$  

$\text{30 My father hasn't worked in this factory for two years}$  

$\text{Học tốt!!!}$