As a student we write a lot and do many things that force us to have correct grammar, but why do we say "this is" instead of "this's"? It really makes no sense, not that English ever has, but still...
I would think it's because the apostrophe would represent a vowel sound that's omitted in speech. g. "that-iz" becomes "thatss"; so we write them with an apostrophe.
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I would think it's because the apostrophe would represent a vowel sound that's omitted in speech. Words like that's, where's, who's and so forth are contracted in speech by the omission of the vowel sound, e.g. "that-iz" becomes "thatss"; so we write them with an apostrophe. We don't omit the vowel sound between the S of this and t
laser focus It really makes no sense
It does make sense.
English contractions involve the elision of a vowel (which is replaced by an apostrophe in writing), as in I'm for "I am", and sometimes spelling changes as well, as in won't for "will not."
Note that when you say the contracted version, the resulting sounds allow m