$21/$ He didn't speak slowly enough for us to hear well.

- S + V + so + adv + that + S + V : quá ... đến nỗi mà

- S + V + adv + enough + (for O) + to : đủ thế nào (cho ai) để làm gì

- Thì Quá khứ đơn ( - ) S + did not/ didn't + V (bare)

- Anh ấy nói không đủ chậm cho chúng tôi để nghe rõ.

$22/$ It was such good weather that we could go on a picnic.

- S + to be + adj + enough + (for O) + to V : đủ thế nào (cho ai) để làm gì

- S + to be + such + (a/an) + adj + N + that + S + V : quá ... đến nỗi mà

- Thì Quá khứ đơn ( + ) S + was/ were + ...

$23/$ The sea is not warm enough for me to swim in.

- Thì Hiện tại đơn ( - ) S + am/is/are + not + ...

- too adj : quá thế nào 

- Dịch : Biển không đủ ấm cho tôi để bơi.

$24/$ The song is simple enough for her to sing.

- Dịch : Bài hát đủ đơn giản cho cô ấy để hát.

$25/$ The patient was so weak that he couldn't get up.

- Dịch : Bânhj nên quá yếu đến nỗi mà anh ta không để dậy.

`21`.He didn't speak slowly enough for us to hear him well

`->` Enough ( `21 , 23 , 24` ) :

`=>` S + is / am / are / ... / V + adj / adv + enough ( for O ) + to do sth

`=>` Đủ để làm gì

`22`.It was such good weather that we could go on a picnic

`->` Such :

`=>` It / S + is / am / are / ... + such + a / an + adj + N + that + Clause

`=>` Quá ... đến nỗi mà ...

`23`.The sea is not warm enough for me to swim in the sea

`24`.The song is simple enough for her to sing

`25`.The patient was so weak that he can't get up

`->` So ... that :

`=>` S + is / am / are / ... + so adj + that + Clause

`=>` Quá ... đến nỗi mà ...

`\text{# TF}`