She has had a recurring nightmare since childhood.
it was recurring
"The water cycle is a cyclic process is a cyclic sentence."
To recur means to happen over and over again. Here are some sentences.If you live on a fault line, you can expect an earthquake to recur occasionally.Her symptoms will recur if she does not follow the doctor's orders.The drought looks like it will recur.
The mouse was recurring.
Yes
benign
Adjuvant therapy is used to decrease the chances that cancer will recur.
i do not know how to use embalming in a sentence. (there is the sentence)
yes but it is uncommon
No
Recur and Reoccur can usually be used interchangeably, but try to find some other synonyms that sound less alike for style.
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.