Because perilous is an adjective, one could think that it would go along with the subject; however there are numerous places in which it belongs in the predicate of a sentence, e.g. "This is quite perilous." Most cases where "perilous" appears in the predicate include a helping verb, e.g. in the sentence above, "is." For a regular sentence, e.g. "This perilous mission should not be taken lightly," the adjective, i.e. "perilous," appears before the subject, "mission."
He came perilously close to falling. Perilously = dangerously.
I think you mean perilously (it contains the word peril and the word perilous): You set that pot perilously close to the edge of the stove.
gravely, badly, seriously, severely, dangerously, perilously
Priscilla purred and perilously pawwed the playful parakeet!
The border of British Guiana and Venezuela.
i do not know how to use embalming in a sentence. (there is the sentence)
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.
use contingency in a sentence?
How do you use sedition in a sentence
use adainty as sentence
Can you use abstemious in a sentence?
use aver in a sentence