`\color{#145277}{N}\color{#246483}{a}\color{#34768F} {e}\color{#44889B}{u}\color{#539AA7}{n}`

`1.` John used to smoke cigarettes when he was a young man.

`-` S `+` used to `+` V_bare `:` đã từng làm gì nhưng không còn nữa

`2.` He asked students to hand their books to him when they had finished.

`-` ask someone to do sth `:` yêu cầu ai đó làm gì

`3.` In countries like Britain, weather is very changeable.

`-` changeable (adj) `:` có thể thay đổi

`-` HTĐ `:` S `+` am `/` is `/` are `+` adj `/` N

`-` very `+` adj

`4.` Secondary education is free in Britain.

`-` do not have to pay `:` không cần trả tiền `=` free `:` miễn phí

`5.` His heart was so weak that he couldn’t walk very far.

`-` Cấu trúc so `...` that `:` S `+` be `+` so `+` adj `+` that `+` S `+` V

`6.` If he doesn’t phone immediately, he won’t get any information.

`-` IF `1` `:` IF + S + V(HTĐ), S + will / can / may + V_bare

`-` Unless `=` If not

`7.` When did they buy the house `?`

`-` When `+` did `+` S `+` V `+` O `?`

`->` How long is it `+` since `+` S `+` V2/ed

`8.` The broken vase couldn’t be repaired by him.

`-` Bị động modal verb `:` S `+` could `+` be `+` V3/ed

`9.` The garden hasn’t been dug yet.

`-` Bị động HTHT `:` S `+` have `/` has `+` been `+` V3/ed

`10.` Is this the cheapest carpet you’ve got `?`

`-` S `+` have `/` has `+` got `+` a `+` tính từ SSH `+` noun `+` than `+` N

`->` Is this the `+` tính từ SSN `+` N `+` (that) `+` S `+` have `/` has got `?`