[Grammar] Does this sound strange?

[kolooko]

I promised to call back within an hour.

I saw this expression. How about following?

I promised to call back in an hour.

 

[tedtmc]

1. I promised to call back within an hour.

2. I promised to call back in an hour.

The two sentences have different meanings.

Let's say you made the promise at 10.00.
'Call back within an hour' means you will call back anytime between 10.00 and 11.00.
'Call back in an hour' means you will call back at 11.00.

not a teacher

 

[Honghua Wu]

1. I promised to call back within an hour.

2. I promised to call back in an hour.

The two sentences have different meanings.

Let's say you made the promise at 10.00.
'Call back within an hour' means you will call back anytime between 10.00 and 11.00.
'Call back in an hour' means you will call back at 11.00.

not a teacher

I agree.

not a teacher

 

[Eric Davis]

I promised to call back within an hour.

I saw this expression. How about following?

I promised to call back in an hour.

Neither sound strange to me. However, each seems to have its own meaning regarding the time you promised to return a call.

 

[kolooko]

Neither sound strange, but they have a bit different meaning, right?

Thank you!

 

[bhaisahab]

Neither sound strange, but they have a bit different meaning, right?

Thank you!

Yes, that's right, tedtmc's answer is correct.