Lets take highway 890 to get to portland
If referring to a particular "highway," it is "Highway 66." If you are describing going down a highway, it is a "highway."
I drove on a highway to get to my destination.
There are two nouns in the sentence: truck and highway.
It's time to hit the highway. The highway is jammed, right now. Let's take the expressway, instead of the highway.
We drove down the highway at top speed. She pulled carefully onto the highway after looking both ways.
Taxes are used to finance such public works as highway construction and sewage treatment plant construction.
compound noun
Example sentence - The grate in the road kept the cattle away from the highway.
The word "highway" is singular. Its plural form is "highways." In a sentence, you would use "highway" when referring to one road and "highways" when discussing multiple roads.
He was recklessly driving the car on the Highway.
In the sentence "Their car always breaks down on the highway," there is one adverb: "always." It modifies the verb "breaks down" by indicating the frequency of the action.
old