`1.` had started
- Thì QKHT
- QKHT + before + QKD
`2.` has rained
- DHNB: since yesterday
- Thì HTHT
`3.` had
- Thì QKHT
- By the time + QKD,QKHT
`4.` will get
- Câu điều kiện loại 1
- If +S + V(s/es) + ...,S + will + V-infi + ..
`5.` will be
- DHNB: next June
- Thì TLD
`6.` sang - were coming
`7.` worked - were phoning
`8.` did you do
- DHNB: yesterday
`9.` to go
- S + would prefer + N/ to V
`10.` were
- Câu điều kiện loại 2
- If + S + V-ed/V2 + ..., S + would + V
`11.` to go
`12.` came - had finished
- By the time + QKD,QKHT