my phone rang in a constant pattern.
The questions were constant, and the answers few.
The passage of time has a constant erosive effect.
Example sentence - His constant inability to give his children a consequence for their bad behavior led to the demise of our relationship.
The meringue needed constant monitoring to prevent over-beating.
She was riled by his constant lies.
The calls were coming in constantly.
I found her gum-chewing to be a constant annoyance.
I wonder what is the constant speed of this moving car
How about: "Someone asked me for a sentence using the word derivative."
The gauze bandage was held tightly so as to keep constant pressure on the wound.
The constant creak on the floor made him sleepless.
The constant erosion will eventually degrade the bank.