The professor was constantly badgering us to think outside the box.
I am breathing hard constantly when I run on my treadmill.
He constantly reverted to his childhood.
The calls were coming in constantly.
A sentence for using the word is :: My new wig is constantly falling off.
The atmosphere was laden with moisture. The atmosphere constantly changes.
Taking this to be the sentence (it's slightly edited):"The old car caused trouble constantly, but she never complained."the adverbs are "constantly" and "never." Both state when the action of the verbs ("caused," "complained") took place.
She was so jealous that she constantly checked his phone and computer.
I am constantly admonishing contributors to punctuate the end of example sentences!
The rebellious young boy is constantly defying his teacher's authority.
The women constantly worked out, and finally she reached her svelte figure.
You will not hasten the end of the class by constantly watching the clock.
There are volcanoes that are constantly erupting all over the world.