Englishfor English speakers
send
Verb
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To send something is to make the thing go somewhere without the person. A person sends a letter by putting it in a mailbox. A person can send another person somewhere by telling the person to go there.
She needed to send a letter to her mother to say she had arrived safely.
Could you send Roger into see me please?
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.
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.
contribution
Noun
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A contribution is something that you give or add.
Technology to reduce pollution could make a significant contribution to the solution.
Some of his most important early contributions were his detailed descriptions and illustrations.
Their contribution in October has been revised down from £300million to the same level.
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The money you give to someone, especially for a donation, is your contribution.
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The amount of work you did on a project.
His contribution was very low. He did almost nothing.