$1.$ Were they stronger, they could lift the table.

Đảo ngữ câu ĐKL2 - tình huống không có thật ở hiện tại hoặc tương lai:

   Were + S + (to V) + O, S + would/could/might + V

$2.$ Had he studied hard, he would have passed his exam.

Đảo ngữ câu ĐKL3 - tình huống không có thật ở quá khứ:

   Had + S (not) + $VPII$, S + would/ could/ might + have + $VPII$

$3.$ Had he not changed our reservations, we should all have been killed in the crash.

$4.$ Were Bradon not a point guard, he would be in the game now.

+ Trong câu ĐK loại 2 "were" áp dụng cho mọi ngôi (số ít/ nhiều)

$5.$ Had you asked him, he would have lent you his violin.

$6.$ Should there be any difficulty, you can call me.

Đảo ngữ câu ĐKL1 - diễn tả tình huống không có thật ở hiện tại hoặc tương lai.

Should + S + V, S + will/ shall/ can + V (inf)