Her cousin isn't interested in going fishing in his free time. ( enjoy)

`=>` Her cousin doesn't enjoy going fishing in his free time.

`-` Hiện tại đơn - in his free time

`(+)` S + Vs/es

`(-)` S + don't/doesn't + V

`(?)` Do/Does +  S + V ?

`=>` interested in = enjoy(s) + Ving : thích làm gì

Although Ba tried his best, he couldn't get the best result. ( In spite)

`=>` In spite of trying his best, Ba couldn't get the best result 

`->` In spite of/ Despite + Ving/N 

`=` Although + Clause

Her father ate a lot of vegetables last night.( Change into passive)

`=>` A lot of vegetables were eaten by her father last night

`->` Bị động - Quá khứ đơn ( last night)

`(+)` S + was/were + PII (by.....)

`(-)` S + was/were + not + PII (by.......)

`(?)` Was/Were + S + PII (by........)?