Englishfor English speakers
extend
Verb
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If you extend something, you make it longer.
They extended the meeting so that more people could speak.
The muscles contract and extend to move the body.
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If something extends from mathx/math to mathy/math, it covers all the time or space in between.
The Alps extend from France to Austria.
The middle ages extended from ancient to modern times.
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If you extend something, you offer it
I would like to extend to you an invitation to the party.
a
Determinative
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A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
visa
Noun
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A visa is a document that gives you permission to enter a country.
His visa expired today.