[Grammar] When to use the preposition IN, ON, AT ???

[johnnesteixeira]

I am too bad in these prepositions: In, on, at.
I don't know when to use them.

For example:

"I didn't let you in/on/at beach." <------ Must I use IN, ON, or AT in this sentence?

Thank you!

 

[MikeNewYork]

I am too bad in these prepositions: In, on, at.
I don't know when to use them.

For example:

"I didn't let you in/on/at beach." <------ Must I use IN, ON, or AT in this sentence?

Thank you!

"On the beach" in that use.

 

[Rover_KE]

"I didn't let you in/on/at the beach." <------ Must I use IN, ON, or AT in this sentence?

I'm not sure what you mean by 'I didn't let you in/on/at the beach'.

You could say 'I didn't see you on the beach' or 'I didn't see you at the beach.'

 

[MikeNewYork]

I'm not sure what you mean by 'I didn't let you in/on/at the beach'.

You could say 'I didn't see you on the beach' or 'I didn't see you at the beach.'

I assumed that the OP meant that he stopped somebody from using the beach.

 

[emsr2d2]

If the OP's job is to guard the entrance to a beach, then that's fine. Otherwise, I can't see how anyone could not let someone else on the beach. I wondered if perhaps it should have been "I didn't let you go to the beach" (perhaps what a parent says to a child).

 

[MikeNewYork]

If the OP's job is to guard the entrance to a beach, then that's fine. Otherwise, I can't see how anyone could not let someone else on the beach. I wondered if perhaps it should have been "I didn't let you go to the beach" (perhaps what a parent says to a child).

It might also be a privately owned beach. But I agree, this is all speculation.