$1$. Were today not to be cold, we would go swimming

`->`Đảo ngữ câu đk loại 2: Were + S + (not) + to V, S + would/could + V

$2$. Had i attended the lecture,i could have done this

`->`Đảo ngữ câu đk loại 3: Had + S + (not) + Ved/3, S + would/could + have + Ved/3

$3$. Were i to bring money ,i wouldn't give back the book

`->`Đảo ngữ câu đk loại 2: Were + S + (not) + to V, S + would/could + V

Đáp án + giải thích: 

1. If today weren't very cold,we would go swimming

=> Were today not to be cold, we would go swimming

Giải thích: Ta đảo ngữ câu của điều kiện loại 2như sau:

      Were + S + to V, S + would/could + V

2. If I had attended the lecture,i could have done this

=> Had i to attended the lecture,i could have done this

Giải thích: Ta đảo ngữ câu của điều kiện loại 3 như sau:

            Had + S + Ved/3, S + would/could + have + Ved/3

3. If i brought money ,i wouldn't give back the book

=> Were i to bring money ,i wouldn't give back the book

Giải thích: Ta đảo ngữ câu của điều kiện loại 2 như sau:

              Were + S + to V, S + would/could + V

( Hay thì cho mình câu trả lời hay nhất, 5 sao và lời cảm ơn nhé! Chúc bn học tốt!)