`1`. If he won the race, he wouldn't be sad.
-> If 2 : If + S1 + V2/ed, S2 + would + Vinf
`2`. My mom asked me if I was busy.
-> Chuyển sang câu trần thuật nên lùi thì, chuyển " you " thành "I "
`3`. Homeless people were given free temporary accomodation after the storm by the goverment.
-> Câu bị động quá khứ đơn: S + was/were + Vpp