Englishfor English speakers
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.
expected
Adjective
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If something is expected to happen, it is regarded as likely to happen and can be anticipated.
The expected storm never arrived.
gain
Noun
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A gain is the act of getting something.
You have nothing to gain.
—
What one gains, as a return on investment or dividend.
No pain, no gain.
—
The factor by which a signal is multiplied.
gain
Verb
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You gain something by getting or receiving it.