Englishfor English speakers
a
Determinative
—
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".
—
In some schools, an A is a very high grade.
Ron got an A on his earth science test.
force
Noun
—
A force the act of a thing pushing on another thing, or how strongly it pushes.
The force of the hammer hitting the nail pushes the nail into the wood.
In science, energy is force times distance.
He pushed his shoulder against the door with great force, but was not able to open the locked door.
—
A group that aims to attack, control, or constrain.
police force
force
Verb
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Someone forces something to happen when they make it happen.
He forced his way into the room.
The large size of our family forced me to buy a bigger house.
more
Determiner
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A larger amount.
He does more work than I do.
A lot more than twenty people came to the meeting.
You can have a little more money.
More than one glass was broken.
—
.
I want more soup.
more
Adverb
—
Having a larger amount of a characteristic in a group.
Pat is more intelligent than Terry.
powerful
Adjective
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If someone (or something) is powerful, they have much power.
The king is a very powerful man.
Big guns are powerful weapons.
A tiger is powerful animal.
The train has a powerful engine.