Time vs. Place: What's the Difference in Prepositions?

If you want to use "I hope" and "I wish" correctly, you just need to memorize these two phrases:

I hope I can...

I wish I could...

You may be wondering: why do English speakers use the present tense for "hope" and the past tense for "wish"?

The secret is that "could" is not really past tense. It looks like the past tense, but it's secretly something different. It's the "unreal" aspect. In other words, it expresses something that's not really true, or not very likely.

We use "wish" to talk about things that are impossible, or things that probably won't happen:

I wish I could fly.

I wish there were more hours in the day.

I wish I'd studied something a little more practical.
The differences between hope & wish.

On the other hand, we use "I hope..." when there's a good chance that something might happen. You can use it to say what you want to happen in the future:

I hope this cake turns out OK.

I hope we can still be friends.

The grammar of "wish" and "hope"
Here's how "wish" and "hope" look in the present, past, and future.

Present

I hope this is the last mistake.

I wish my phone worked here.

Past

I hope Antonio got home safely.*

I wish you'd told me sooner.

* You can't use "hope" to talk about something in the past, unless you don't know what happened yet. In this example, you haven't heard whether Antonio got home safely.

Future

I hope it stops raining soon.*

I wish it would stop raining.

* You follow "hope" with the present tense of a verb, even when you're talking about the future. So you say "I hope it stops" instead of "I hope it will stop."