Conditional Sentences

In the following sentence, Sheldon is using an exceptional form of conditional sentences. This form of sentences is highlighted in the following table. 

Sheldon: I'm being petty? You know Barry and I have a professional rivalry. You heard him-- he told me to suck eggs. If we were friends, he would have suggested I suck something more pleasant. Why are you laughing? Did you learn something?

Conditional SentencesType II (unlikely)

Condition refers to:	IF Clause		Main Clause
present / future event	Simple Past	If I had a lot of money, …	Conditional I	…I would travel around the world.
consequence in the past	Simple Past	If I knew him, …	Conditional II	…I would have said hello.

More examples:

1. A couple of minutes ago, I tried to reach Sue on the phone, but I'm afraid she is not there because …
   If she were at the office, she would have answered the phone.
2. I am trying to reach Sue on the phone now, but I'm afraid she is not there because …
   If she were at the office, she would answer the phone.