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How do languages say “there is”?
“The water is in the river” takes the water as given and tells you where it is. “There is water in the river” reverses that: the river is the setting and the water is the news. Saying that something exists therefore reuses the machinery for saying where it is, and languages differ in how much they change along the way — some leave the locational predicate untouched, some add a placeholder subject, some borrow the possessive verb, and some keep a predicate for existence alone. The choice often splits by animacy and by number.
How do languages say “I have X”?
Some languages use a transitive HAVE verb; others say “at me, X is”, “to me, X is”, or “I-with X”. The same language often switches strategy with what is possessed — inanimate, animate, kin, body-parts.
How do languages build the paradigm of someone, anyone, no one, and everyone?
Most often these words share one interrogative base (who?) plus a small particle — “also”, “every”, “some”, “any” — that sets the reading. A few languages, English among them, lexicalise the series instead.
How does a language say that two things match in degree?
English needs two little words for it: as tall as her mother. The commonest arrangement worldwide uses just one — French grande comme sa mère, Turkish annesi kadar uzun — and a smaller group puts the two people together and calls them equally tall. A few make a verb do the work, so that she reaches her mother in height. Across a 119-language survey, one arrangement is virtually unattested wherever the standard stands as a phrase of its own: a degree word with the standard left bare.