Câu điều kiện loại `3` diễn tả giả định trái với thực tế trong quá khứ:

If + S + had + (not) + V3/ed, S + would/might/could… + have + V3/ed

Đảo ngữ của nó: Had + S + (not) + V3/ed, S + would/might/could… + have + V3/ed

Câu điều kiện loại `2` diễn tả giả định trái với thực tế ở hiện tại:

If + S + V2/ed (be `->` were), S + would/might/could… + V1

Đảo ngữ của nó: Were + S + (not) + (to V1), S + would/might/could… + V1

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`6,` Were I to have a map, I would lend it to you

`7,` Were he not to study more, he wouldn't pass the exam.

`8,` Were I the President, I would lower taxes.

`9,` Had you told me, I could have helped you.

`10,` Had the teacher helped me, I wouldn't have had to go to the library.