$\text{@su}$
`11`, knew / were / wouldn't phone (CĐKL2)
`12`, make / will be punished (CĐKL1 kết hợp bị động)
`13`, followed / wouldn't be (CĐKL2)
`14`, don't have (CĐKL0)
`15`, don't call / will be (CĐKL1)
`16`, would save (CĐKL2)
`17`, would answer / were (CĐKL2, nếu tôi là bạn tôi sẽ...)
`18`, finish / would help (đảo ngữ CĐKL2)
`19`, knew / wouldn't go (CĐKL2: If + S + V-ed, S + would + Vbare)
`20`, would have been (CĐKL3)
$\text{#BTS}$