If I were in Hawaii right now, I [sunbathe] on a beach. I would not be stuck here in this office with mountains of paperwork.
would be sunbathing
If Sam hadn't stopped to pick up that quarter, he [cross] the street when the car ran the red light. He could have been killed!
would've been crossing
I wish we had time to organize a surprise party for Linda. If all of her friends [sit] in her apartment waiting for her when she gets home from work tomorrow, she would be so surprised!
were sitting
Charles arrived late again to work yesterday. He came running into the office complaining of car problems, but everyone knew it was a lie. If the boss [stand] there when he showed up, I am sure he would have been fired.
had been standing
If I were a millionaire, I [not work] here in this factory.
wouldn't be working
Jane's plane arrived a half an hour ahead of schedule. If we hadn't decided to go to the airport early, she [wait]
would've been waiting
They canceled all the flights out of Chicago today because of the blizzard. If it [not snow] so hard, I would not be stuck in the airport.
hadn't snowed / hadn't been snowing
When Mike came home yesterday, he claimed he had been jogging. I didn't believe a word he said. If he had really been jogging, he [sweat] or at least out of breath. I think he went down to the coffee shop and had a donut.
would've been sweating
John is so incredibly lazy! If we went over to his house right now, I bet he [lie] on the couch with some pizza in one hand and a remote control in the other.
would be lying
If she [stay] in that hotel next week while the trade show is being held, she might be able to meet some contacts and tell them about our new line of computer software.
stayed / were staying