1. You have seen her, haven't you? ( Câu hỏi đuôi thì hiện tại hoàn thành: S + have + V quá khứ phân từ, haven't + S?

2. I find it useful to surf the net. (find it + adj + to V: thấy việc gì là như thế nào)

3. Watching TV is a time-consuming activity. (time-consuming: tốn thời gian)

4. Town criers used to ring the bells and shout the latest news as they were walking. (used to V: trước đây thường làm gì)

$1$ `:` You have seen her , haven't you ?

`-` Câu hỏi đuôi HTHT `:`

`->` S `+` have `/` has `+` V3 `/` V`-`ed `+` O , haven't `/` hasn't `+` S ?

$2$ `:` I find it useful to surf the net.

`-` S `+` find `+` sth `+` adj `+` to `+` V_inf `+` O.

`->` Ai thấy việc gì đó như thế nào

$3$ `:` Watching TV is a time`-`consuming activity.

`-` Time`-`consuming `:` Phí thời gian

$4$ `:` Town criers used to ring the bells and shout the latest news as they were walking.

`-` Used to `+` V_inf `:` Đã từng làm gì đó