Real situation : - I don't have enough money now. I can't buy that shirt. Conditional : 1. Change the present tense into past tense ( but the meaning is present ). 2. Change the positive sentence becomes negative. Or.. 3. Change the negative sentence becomes positive. - If I had enough money now. I could buy that shirt. Another example : Real situation : - I don't know her phone number. I can't phone her now ( I really want to phone her now ). Conditional : - If I knew her phone number, I could phone her now. It's easy, isn't it ? Now make a sentence using 2nd Conditional. Write the real situation first.