9. Maryam began to learn Vietnamese when she came back from Ha noi. → Maryam has ………………………………………………………………………………… 10.The trip to the countryside was very interesting to the children. → The children felt ………………………………………………………………………………….. 11. She always makes a special cake for her mother on her birthday. → A special cake ……………………………

$9.$ Maryam has learned Vietnamese since she came back from Ha Noi.

- S + have/ has + V (Pii).

- since + mốc thời gian.

$10.$ The children felt very interested in the trip to the countryside.

- S + V (-ed/ bất quy tắc).

- feel + adj.

- Vì đây miêu tả cảm giác của con người nên dùng "interested" (adj): hứng thú.

$11.$ A special cake is always made by her for her mother on her birthday.

- Câu bị động thì hiện tại đơn: S + am/ is/ are + (not) + V (P_II) + (by O).