I would be able to travel with you if I hadn't spent all my money on video games. (IF ONLY)
If only I hadn't spent all my money on videogames, I'd be able to travel with you.
Do you believe you and dad would have met somewhere else if you hand't gone to school together, Mum? (SUPPOSE)
Suppose you and Dad hadn't gone to school together, do you think you would've met somewhere else, Mum?
I didn't know we had to write an essay about this book, I didn't read it. (IF)
If I knew we had to write an essay about the book, I would've read it.
How would you spend your money if you won the lottery? (SUPPOSE)
Suppose you win the lottery, how would you spend your money?
I didn't know you guys were coming. I didn't buy any food! (IF)
If I knew you guys were coming, I would've bought some food.
Have you finished all your homework? If you have, then you can go out with your friend. (PROVIDED THAT)
You can go out with your friends provided that you have finished all your homework.
People will continue to post fake news online because no one does anything to stop it. (UNLESS)
Unless someone does something to stop it, people will continue to post fake news online.
Maybe the teacher will let us check our notes during the test, so I'll take my notebook. (IN CASE)
I'll take my notebook in case the teacher lets us check our notes during the test.
I can lend you some money, but you have to pay me back. (AS LONG AS)
I can lend you some money as long as you pay me back.