Mistake: who was the winner of that competition.
`->` who the winner of that competition was.
Câu gián tiếp với WH-question (Who, What, When, How, Which,...)
S + asked/asked someone/ wanted to know / wondered + WH-question + S + V(lùi thì).
Cách biến đổi thì của các động từ và động từ khuyết thiếu:
will / shall `->` would/should
am/ is / are going to → was / were going to
Present simple `->` Past simple
Present continuous `->` Past continuous
Past continuous `->` Past perfect continuous
Present perfect `->` Past perfect
must `->` had to
can `->` could
Cách biến đổi từ chỉ thgian và nơi chốn:
today `->` that day
tonight `->` that night
tomorrow `->` the next day / the following day
yesterday `->` the day before/ the previous day
ago `->` before
now `->` then
this `->` that
these `->` those
here `->` there
