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When you make a general statement or reccomendations such as:

・When you are in trouble, you find out who your friends are.

・To improve your English, you can watch more TV, visit your American friends, read more in English and keep a journal in English. You should not just sit in your room with a book and tape because you are not getting any feedback on your use of the language.

How do you perceive the 'you's above? Do you see them as singular? Or as plural?
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Singular, if read by a person alone. Plural, if read in common by a group.
Comments  
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Marius HancuSingular, if read by a person alone. Plural, if read in common by a group.
Which do you think the writer's intention might be?
In the first example, the non-personal you that can also be "one."

In the second, if I had to choose, I'd go with singular. Even if a speaker is addressing a group of people with suggestions, each person needs to act on those suggestions individually.
I see them as singular.
CJ
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