$15.$ had already run/ came
- S + had + V (Pii) by the time + Past simple.
$16.$ was waiting/ stopped
- While + Past continuous, Past simple.
$17.$ has not received/ spoke
- S + haven't/ hasn't + V3 since + S + V2.
$18.$ will do/ don't come
- Will + S + V if + S + V (s/es)?
$19.$ was written
- S + was/ were + V (Pii).
$20.$ passed
- S + wish (es) + (that) + S + V (Lùi thì).
$21.$ getting/ got
- help + V-ing: không thể không làm gì.
- S+V2.
$22.$ will go
- If + S + V (s/es), S + will + V.
$23.$ were watching/ got
- S + was/ were + V-ing when S + V2.
$24.$ have ever seen
- It's the first time + S + have/ has + V3.
$25.$ has not helped
- S + have/ has + V3.
$26.$ got/ were not being prepared
- S + was/ were + being + V (Pii).
$27.$ making
- stop + V-ing: ngưng không làm gì.
$28.$ was cleaned
- S + was/ were + V (Pii).
$29.$ drinks
- S + V (s/es).
$30.$ have cooked
- S + have/ has + V3
