11. is taking ( thì HTTD; dấu hiệu : now)

- HTTD: S+be+V-ing+O

12.will pass

-S + certain/sure + mệnh đề that 

13. are being sold

14.teach

- shoud +V-inf : nên lmj

15. the most popular

- so sánh nhất với adj dài:

S + V + the + most + adj + N

`11.` is taking

`+)` now `->` HTTD

`+)` HTTD: S + tobe + V-ing + O

`12.` will pass

`+)` S + tobe + sure that + S + V + O

`13.` are being sold

`+)` bị động HTTD: S + tobe + being + V-ed/P2 + (by O)

`14.` teach

`+)` should + V-inf: nên làm gì

`15.` the most popular

`+)` so sánh nhất: S + tobe + the + adj-est/most adj + N 

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`@yt2704`