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
—
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.
sound
Noun
—
any noise; something that can be heard by the ears.
There was a loud sound.
sound
Verb
—
If something sounds a particular way, you think it is that way when you hear or read about it.
The restaurant sounds great.
of
Preposition
—
Made using.
It is a house of cards.
thunder
Noun
—
Thunder is the sound made by lightning.
He heard thunder in the distance.
—
Thunder is a loud sound.
The thunder of the train was very loud.
The battlefield was full of the thunder of gunfire.
thunder
Verb
—
To make a loud noise like thunder.
The bowling ball thundered down the lane.