[ابو بيشو]

That firm does more business than some of its competitors.
some of =a number of ,but not all
That firm does more business than any of its competitors.
any of=all
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Richard is older than some of the other boys in his class.
ومعنى هذه الجمله
He isn't the youngest ,but he isn't the oldest.
Richard is older than any of the other boys in his class.
معناها
He is the oldest.
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جمله للفت النظر فقط
I have no other friend but you.
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They love each other.
=Two persons love each other.
They love one another.
More than two persons love one another..
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The London team ,which played so well last season,has done badly this season.
The team,who are just getting their tickets ,will meet on the platform at 2 o'clock.
عند استخدام فعل مفرد نستخدم which بينما عند استخدام فعل جمع نستخدم who