Englishfor English speakers
in
Preposition
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Used to show that something is inside something else.
The cat is in the box.
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Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
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Used to show movement towards the inside.
The rain came in through the window.
general
Adjective
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Usual; about most things. An idea is a general idea if it's about many things or about most things, not just about one specific thing.
First I will talk about general problems of farming, and then I will talk about the specific problems of wheat farming.
In general, I enjoy pizza.
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General is approximate, not exact; maybe a little different; close but maybe not the same.
general
Noun
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A general is the leader of an army.
The president told the general to bring the army home.
usage
Noun
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The way or the amount of using; use.
I learnt the usage of some verbs while studying the language.
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A habit or accepted practice.