Possibly this question is a duplicate; please direct me to the appropriate question if this is the case.
The word it's is a contraction of it is. Is it ever acceptable to use an apostrophe as a contraction for general pairs of words of the form
for nouns other than it? More specifically, is it acceptable to write
My father's angry with me
instead of My father is angry with me? The sentence above seems (?) acceptable in spoken English, but I'm not sure about written English.