`1.` I must have forgot to pack my trainers.

$\text{S + must + V-bare}$

`2.` The crash would have been too bad if the pilot hadn't landed in a field.

$\text{If + S + had + V(pp), S + would/could/should (not) + have + Vp2}$

`3.` Jane had some food delivered by the supermarket.

$\text{S + had + Ved/V3}$

`4.` George warned Martina about going out alone at night.

$\text{ S + warn + sb + of/about }$

$chucbanhoctot$

$#thaonguyeneakar$

1. I think I forgot to pack my trainers. _I must have forgotten to pack my trainers

S+ must have forgotten to do sthing

2. The crash wasn't too bad because the pilot landed in a field. _The crash would have been worse if the pilot hadn't landed in a field

3. Jane asked the supermarket to deliver some food. _Jane had some food delivered (by the supermarket)

Cấu trúc: had something done

4. George told Martina that she shouldn't go out alone at night. _George warned Martina against going alone at night

Câu trúc: S + warn + sb + of/ about +...

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