Quando usar 's

Avatar do usuário TheBigSpire 1070 1 6 25
Na frase "Have a good night's sleep".

Alguém saberia me dizer a razão do 's após night?
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Avatar do usuário Juliana Rios 18850 21 98 389
TheBigSpire,

Eu sinceramente não sei a origem ou a razão pela qual o "s" é empregado neste caso. Acredito tratar-se de um uso alternativo do genitivo, porém pouco enfatizado. Na prática, eu imagino o "s" como sendo um substituto de "of". Acho que esta "regra" é aplicável na maioria dos casos. Exemplos:

"To have a minute's silence".
"To have a moment's silence".
"A good night's sleep".
"A hundred dollars for one hour's work".
"Dismissed with a week's notice".

Observe que, em todos os casos, "s" poderia ser substituído por "of" (one hour of work, a good night of sleep, a minute/moment of silence, a week of notice etc.)
Avatar do usuário TheBigSpire 1070 1 6 25
Poisé, Juliana, eu havia feito essa correlação entre o 's e a preposição of, pesquisei no Google e não achei nada.

Talvez seja algum tipo de collocation, onde podemos utilizar em alguns casos e em outros não.
Avatar do usuário Rakell Grubert Pere 3385 3 6 65
Complementando:

We use 's and s' with some non-living things:
Fixed phrases:
the earth's surface
the ship's company
Journey's end

Time expressions:

Such as 3 years' insurance (also called 'temporal expressions').
In a temporal expression, the apostrophe is positioned before the s for single units of time and after for multiple units of time.

I never did a day's work in my life. It was all fun. (Thomas A. Edison)
(one day - apostrophe before the s)

Alan was given one day's notice.
(one day - apostrophe before the s)

That is the equivalent of one year's pay.
(one year - apostrophe before the s)

My car came with one year's free insurance.
(one year - apostrophe should be before the s)

There is six months' interest-free credit on all sofas.
(six months - apostrophe after the s)

Do not use apostrophes for all time expressions – ONLY WHEN THEY COULD REPLACE THE WORD 'OF'

The following do not have any apostrophes in them:
I lived in Africa for 3 years.
She has six months left to run on her loan.

She has six months' left to run on her
loan.

She has six months of left to run on her loan.

As a rule, you should only use an apostrophe in an expression where the word 'of' might have been used.

six months' insurance (six months of insurance)
a day's leave (a day of leave)

The vast majority of these expressions are time expressions, but some relate to value and distance too:

10 pounds' worth of potatoes and 1 pound's worth of onions
a stone's throw away

We also use 's when refering to work places, shops and houses, but we generally omit the noun after the " 's "
The doctor's rather than doctor's surgery.
My mother's rather than my mother's house.
We were married in St. Andrew's rather than St. Andrew's church .( the church dedicated to St. Andrew)
Your mother has gone to the hairdresser's rather than hairdresser's shop.
Avatar do usuário Juliana Rios 18850 21 98 389
Lembrei de outra:

"The restaurant is located within a minute's walking distance".