1.If there weren't so many Chinese move to HCM City illigally, we wouldn't be at risk of catching covid 19

2.Some online conferences should be organised by the government to dicuss solution for restricting people from moving a lot these day

3. If we don't use water carefully, we won't have enough clean water to use in a few decades

4.By the time my father came home, I had gone to bed

5.Nancy asked Bill if he was going to take his exam the following day.

1. If there weren't so many Chinese move to HCM City, we wouldn't be at risk of catching covid 19. [Conditional sentence type 2: S1+V(past simple)+....., S2+ could/would+ V(inf)+.....]

2. Some online conferences should be organised by the goverment to discuss for restricting people from moving a lot these day. [Passive voice: S+ (be)+ pp+ A(p)+C+ (by O)+ A(t)]

3. If we don't use water carefully, we won't have enough clean water to use in a few decades. [Conditional sentence type 1: S1+ V(present simple)+..., S2+ will/may/can+ V(inf)+...]

4. By the time I went to the bed, my father had come home. (Past perfect: By the time+ past simple.., past perfect]

5. Nacy asked Bill if he was going to take his exam the next day. [Reported speech: S1+ asked O+ if/whether+ S2+ (be)+ V(one tense back)..]

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