"At somebody" ?
If I want to say that for example I'm spending my holiday in my grandma's house, then is the sentence "I'm at my grandma" correct? If not, what word could replace "at" ?

Question

"At somebody" ?
If I want to say that  for example I'm spending my holiday in my grandma's house, then is the sentence "I'm at my grandma" correct? If not, what word could replace "at" ?

Answer

"at" is correct, but don't forget to add "house" at the end.

"I'm at my grandma's house."

Answer

You would say "I'm at my grandma's (place/home)"

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