$15.$ 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