The ducks swam up the river.
The River Thames is in England.
There was a river of blood down the street.
"Is" is the second word of the question, "What is the second word of this sentence?"
The word river is a noun, a common, singular, concrete noun.
When it is at the start of a sentence.
"The canoe entered through the mouth of the river." "The mouth of the river was a good place for fishing." :)
Writing a sentence with a vocabulary word in it
we went across a river
He was prepared to cross the river.
'She emerged from the river'
you can use the word across in a sentence by saying i went across the river in a tube.
I went to the park and i saw fishes in the river
The Tigris River is asian and is between mesopotamia and euphratas
The river is surrounded by levees and pumps.
The playtpus swam in the river.
The Nile river floods and leaves fertile soil.
He moved to a highland far from the river.
We hiked inland, searching for a river.
I swam across the river yesterday.