[مستر هانى حامد]

- يمكن استخدام should بدلا من if في الحالة الأولي .

If he studies hard, he will succeed.
Should he study hard, he would succeed.

- يمكن استخدام should بدلا من if في الحالة الثانية .

If he studied, he'd succeed.
Should he study, he would succeed.

¨ عندما تبدأ الجملة بـ were يأتي بعدهاto ثم المصدر هذا فى الحالة الثانية
·If he pleased his boss, he would get a rise
Were he to please his boss, he would get a rise……
¨ وإذا كانت were موجودة أصلا في الجملة تأتي مكان if
·If I were rich, I would buy a big house.
Were I rich, I would buy a big house.

- يمكن استخدام Had بدلا من if في الحالة الثانية .

If I had enough money, I'd buy a new house.
Had I enough money, I'd buy a new house
¨ يمكن أن تأتي Had بدلا من if فى الحالة الثالثة
·If he had followed the instructions, the machine wouldn't have stopped.

Had he followed the instructions, the machine wouldn't have stopped