Answer:
The lift may have difficulty working, so I used the stairs instead.
I really want a new car, but I cannot afford if I cant save enough money.
The camera I have doesn't work very well, the photos are quiet blurry.
I think drinking too much coffee isn't a very noble idea.
We couldn't find your address so we couldn't send your letter.
The bus driver might not come tomorrow, so ill find a taxi
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He may not be ill today if he didn't walk home in the rain last night.
You've been playing with the cat for hours. If you were allergic to cats, you would notice by now
If they found a taxi. They would be here any minute now.
We wouldn't be stuck here now if you get the carto the garage before we left for our holiday
If I were you, I wouldn't sell my car before I bought another one. How will you go to work now