The first three sentences are correct and commonly used: "I asked my sister out for coffee." This means you invited your sister to go out and have coffee with you. "I asked my sister over for coffee." This means you invited your sister to come to your place (or another location) to have coffee together. "I called my sister over for coffee." This means you phoned your sister and invited her to come to your place (or another location) to have coffee together. Regarding the second set of sentences: "I asked out my sister for coffee." While this sentence is grammatically correct, it can have a different connotation. "Asking someone out" often implies a romantic or dating context. So, using this sentence may give the impression that you're asking your sister out on a date rather than simply inviting her for coffee. It's generally better to use the first sentence, "I asked my sister out for coffee," to avoid any confusion. "I asked over my sister for coffee." This sentence is not commonly used and sounds awkward. It's more natural to say "I asked my sister over for coffee" to express the intended meaning. "I called over my sister for coffee." This sentence is also less common and doesn't convey the same meaning as the original sentence. "Called over" typically suggests calling someone to come closer or visit your location. Instead, it's more appropriate to say "I called my sister over for coffee" to express that you phoned your sister and invited her to join you for coffee. In summary, the first three sentences convey the intended meaning accurately, while the alternative sentences in the second set may not be as commonly used or can have different connotations.

The first three are all good. Stay away from the second three. They are understood, but awkward. The first two are the most common ways of saying this but they mean something slightly different, right? "I asked my sister out for coffee" means you intend to go to a coffee shop or restaurant. "I asked my sister over for coffee" means you are inviting her to wherever you are (usually to the house or apartment where you live). I hope that is helpful.

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