“I will visit my grandma in Saturday” is correct?

Question

Answer

I will visit my grandma ON Saturday. 😊

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"I will visit my grandma on Saturday"

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We use the preposition "on" instead of "in" when talking what we will do on a specific day of the week.

So, in your case, it would be "I will visit my grandmother ON Saturday."

Answer

Cuando quieres preguntar si algo es algo, es mejor decir
"Is.......correct?
"Is this correct?" Envés de "this is correct?"
"Is 'I will visit my grandma on Saturday' correct?"
La pregunta es "Is+subjetivo+lo que quieres saber "
La respuesta será "subjetivo+IS+
Q:"IS she your sister?"
A:"yes, she IS my sister" or "yes, she IS."

Q:"Is this correct?"
A:"yes, this IS correct" or "yes, he IS"

Q:"IS he speaking spanish?
A:"yes, he IS speaking spanish" or "yes, he IS"

Answer

Almost there 😉, but the correct wording is “I will visit my grandma *on* Saturday.”