`1`. He has just collected stamps
`-` What collected stamps are !
`→` Cấu trúc: What + adj + danh từ đếm được số nhiều + (be)!
`-` How collected he is !
`→` Cấu trúc: How + adj/ adv + S + V/ be !
`2`. hates / talking
`→` The teacher số ít nên hate thêm s
`→` Sau hate + Ving
`3`. had she gone / coming
`→` Before là dấu hiệu thì QKHT
`→` Before + Ving
`4`. asked / not to play
`→` Ask + Tân ngữ + not to V