In the sentence
Have you ridden the fastest roller coaster at the amusement park.
Is the verb thence past perfect?
verb thence??
What is the verb?
Is the verb tense past perfect?
No.
https://owl.english.purdue.edu/owl/resource/601/01/
http://englishplus.com/grammar/00000361.htm
So present perfect.
What about this one?
We have tried every possible solution.
Also present perfect?
Yes. Both are present perfect.
In the sentence "Have you ridden the fastest roller coaster at the amusement park," the verb "ridden" is in the present perfect tense, not the past perfect tense. Let me explain how to determine the tense of a verb.
To identify the tense of a verb, we need to look at the verb form and the helping verb (if any). In this sentence, the verb form is "ridden," and the helping verb is "have." The present perfect tense is formed by using the present tense of the helping verb "have" (in this case, "have") and the past participle form of the main verb (in this case, "ridden").
The past perfect tense, on the other hand, uses the past tense of the helping verb "have" (i.e., "had") and the past participle form of the main verb. For example, "She had ridden the fastest roller coaster before."
Therefore, in the given sentence, the verb "ridden" is in the present perfect tense.