1/ If it wasn't always so crowded, I would ride the bike to work.
2/ If our parents didn't live so far away, we would visit them very often.
3/ If you talked to them often, they would understand you.
4/ If Mary had enough money, she could buy a new car.
⇒$4$ $câu$ $trên$ $đều$ $sử$ $dụng$ $câu$ $điều$ $kiện$ $loại$ $2$ :
If + S1 + V2/ Ved, S2 +would/ could/ should…+ V