1. I wish you were keen on learning English.

2. We haven't gone to the cinema for three months.

3. Our teeth should be brushed carefully after meals.

4. He used to go swimming in the river when he was in the country.

USED TO + V1 : ĐÃ TỪNG LÀM GÌ

The last time + S + V2/ed + was time ago = S + have/has not + V3/ed + for time

Công thức wish ở hiện tại

Khẳng định: S + wish(es) + (that) + S + V-ed

Phủ định: S + wish(es) + (that) + S +did not + V

tobe -> were/were not

Câu bi động DTĐB : S + should/must ... + be + V3/ed

`1,` I wish I was keen on learning English.

`->` Câu ước ở hiện tại:

S + wish(es) + S + V-ed/ cột 2 + O

`2,` We haven't gone to the cinema for three months

`->` Thì hiện tại hoàn thành:

(-) S + have/ has + not + Vpp + O + (for/ since + time)

`3,` Our teeth should be brushed carefully after meals.

`->` Câu bị động với động từ khuyết thiếu:

S + modal V + be + Vpp + (by + O)

`4,` He used to go swimming in the river when he was in the country.

`->` Cấu trúc "used to":

S + used to + V(bare) + O