giúp em vs ja em cảm on ạ

$Đáp$ $án$ + $giải$ $thích$:

`1`. `I`t is three years since we went to Spain.

`->` `C`ấu trúc: `I`t's + năm/khoảng thời gian + since + `S` + `V2` / `ed`

`2`. `W`e have been in Budapest for two days.

`->` `DHNB`: `F`or two days `->` chia `HTHT`

`CT`: `S` + `have` / `has` + `V3` / `ed`....

`3`. `T`his is the second time I have visited the Stone Forest.

`->` `T`his is the second time + `S` + have/has + `V3` / `ed`.

`4`. `D`ung is very keen on travelling.

`->` `B`e keen on `=` be fond of + `V`-ing : thích làm `1` việc gì đó.

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