1.It is easy to speak english.we speak english fluently (for)................................. (speaking)....................................... (so)................................. (too)............................. 2.Mike wants to lift the box,but it's too heavy for him (too).......................................... (enough)............................ (so)............................... (such)............................. 3.Tim is a smart baby.He wants to walk,but he's 7 months old (too)................................................ (enough).......................................................... (so)................................................................ (such).............................................

`1.`

`-` It is easy for we to speak English fluently.

`-` Speaking English fluently is easy for us.

`-` It's so easy that we speak English fluently.

`-` It's too easy for us to speak English fluently.

`2.` 

`-` It's too heavy for Mike to lift the box.

`-` It isn't light enough for Mike to lift the box.

`-` The box is so heavy that Mike can't lift it.

`-` It's such a heavy box that Mike can't lift it.

`3.`

`-` Tim is too young to walk.

`-` Tim isn't old enough to walk.

`-` Tim is so young that he can't walk.

`-` Tim is such a young baby that he can't walk.

`----------------`

`-` It `+` tobe `+` adj `+` (for sb) `+` to V: thật...(cho ai)...để làm gì...

`-` V-ing đứng đầu câu với vai trò chủ ngữ.

`-` S `+` tobe `+` so `+` adj `+` that `+` clause

`=` S `+` tobe `+` too `+` adj `+` (for sb) `+` to V

`=` S `+` tobe `+` such `+` (a/an) `+` adj `+` Noun `+` that `+` clause: quá...đến nỗi mà...

`-` S `+` tobe `+` adj `+` enough `+` (for sb) `+` to V: đủ...(cho ai)...để làm gì...