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ENGLISH III - Coggle Diagram
ENGLISH III
COULD
It has the same functions as the verb can, but it is more formal.
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MUST
Indicates probability, prohibition or necessity.
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SHOULD
It is used to ask for an opinion, express an obligation or recommendation.
it is raining, you could use umbrella
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HAVE TO
implies that the obligation comes from someone else, expresses above all an impersonal idea
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