1. 3 reports has been written by John this morning.

2. Has the meeting been fixed for a day? - No, it hasn't been

3. Security has been reinforced at all airports

4. Most shop windows in the area have been destroyed by the riots

5. When we arrived, all the tickets had been sold 

1/ 3 reports has been written by John this morning

2/ Has the meeting been fixed for a day? - No, it hasn't been

3/ Security has been reinforced at all airports

4/ Most shop windows in the area have been destroyed by the riots

5/ When we arrived, all the tickets had been sold 

Áp dụng công thức:

Hiện tại đơn

S + V + O

S + be + V3 (+ by Sb/ O)

Hiện tại tiếp diễn

S + am/ is/ are + Ving + O

S + am/ is/ are + being + V3 (+ by Sb/ O)

Hiện tại hoàn thành

S + have/ has + V3 + O

S + have/ has + been + V3 (+ by Sb/ O)

Hiện tại hoàn thành tiếp diễn

S+ have/has + been + Ving + O

S + have/ has + been + being +V3 + (by + Sb/ O)