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One should take care of one's health.

One should take care of his health.

One should take care of oneself's health.

In my book,

The first sentence is used in British.

The second one is used in American english.

but i think the third sentence is correct grammatically.

Because when the subject and the object is the same person, reflexible pronoun should be used.

Of course at this sentence the object is :"health"

then can't i use oneself's health?

I think there is a possibility.

Is it right?

lz make me confirm~!!
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Comments  (Page 2) 
Thank you, however I'm still confused as to why we can use singular words like 'somebody' or 'someone' with their.
Gramur I'm still confused as to why we can use singular words like 'somebody' or 'someone' with their.
You might want to read this, for instance, from the American Heritage Book of English Usage:

The alternative to the masculine generic with the longest and most distinguished history in English is the third-person plural pronoun. Recognized writers have used they, them, themselves, and their to refer to singular nouns such as one, a person, an individual, and each since the 1300s. For example, in 1759 the Earl of Chesterfield wrote, “If a person is born of a…gloomy temper…they cannot help it,” and, echoing this sentiment, W. M. Thackeray wrote in Vanity Fair in 1848, “A person can’t help their birth."

1 Modern writers of note, from George Bernard Shaw to Anne Morrow Lindbergh, have also used this construction, in sentences such as To do a person in means to kill them and When you love someone you do not love them all the time. The practice is widespread and can be found in such mainstream publications as Christian Science Monitor, The Washington Post, Discover, and Wall Street Journal.

2 The use of the plural pronoun to refer to a singular noun or pronoun is hardly restricted to writing, however. Its use is so common in speech as to go without being noticed. And it is a favorite among advertisers, as in the slogan In matters of taste, to each their own.

3. When people shy away from using they to refer to a singular antecedent, it is usually out of respect for the traditional grammatical rule concerning pronoun agreement. Most of the Usage Panel rejects the use of they with singular antecedents as ungrammatical, even in informal speech. Eighty-two percent find the sentence The typical student in the program takes about six years to complete their course work unacceptable. Interestingly enough, panel members seem to make a distinction between singular nouns, such as the typical student and a person, and pronouns that are grammatically singular but semantically plural, such as anyone, everyone, and no one. Sixty-four percent of panel members accept the sentence No one is willing to work for those wages anymore, are they? in informal speech. Many writers might now consider this too fine a distinction—rejecting they for singular nouns but allowing it for singular pronouns that are plural in meaning—perhaps because they feel it will be missed by readers, who might merely think that the writer is being inconsistent.
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I am an American and I use:

One should take care of one's health. It is proper English.
Hello Cynthia.
Cynthia3754I am an American..
There in your statement, and as a native speaker, is it posiible that you could've omitted the article before American and just said 'I'm American'? Thank you.
Thanks, that was an interesting perusal.
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"Oneself's" is absolutely not correct. You can only say "oneself" as the direct or indirect object of a sentence where "one" is the subject, or for emphasis. Neither of those fits here.

Traditionally, "one ... one's" has been considered Commonwealth English, and "one ... his" has been considered American English. However, I've been assured by many Americans that the latter is considered a bit old-fashioned, and that "one ... one's" is more common now. This is probably a regional thing - that is, there are most likely areas of USA where "one ... one's" is more common, and other areas where "one ... his" is more common.

It is probably safest always to use "one ... one's" here.
I think this habit comes from my travels. I was raised in a subculture here in the US. I was taken in by a group of Bolivian students when I was just turning sixteen years old. I am both an American and a Bolivian. I lived in Bolivia and while there secured my citizenship, so I hold dual citizenships. I have also been the resident of eleven different states, so I am like a mutt when it comes to my English. Right now, I am living in a small, midwestern town, so there is no telling what I might say.
Cynthia, you are being far too hard on yourself.
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