$\text{*Công thức chung:}$
$\text{-Modal verbs:S+Can/May/Have to.......+be+Vpp+O}$
$\text{-Hiện Tại Hoàn Thành:S+Has/Have+been+Vpp+O}$
$\text{-Qúa Khứ Đơn:S+Was/Were+Vpp+O}$
$\text{-Hiện Tại Đơn:S+Am/Is/Are+Vpp+O}$
`1`.→He was seen at the station yesterday
`2`.→Hue wasn't visited by my father last year
`3`.→A lot of homework is always given to us by my teacher
`4`.→Her homework has just been finished
`5`.→Tennis can be played with Mai's sister by her at weekend
`6`.→Letters haven't been written to me for 2 weeks
$\text{@TriLeCongTri}$
$\text{chúc em học tốt!!!!!!!!}$