The word 'lough' is a noun and so doesn't have a present perfect tense.
Since lough is an noun not a verb, there is no past tense of lough. The past, present and future of lough is lough. For example I had been swimming in an lough before or I want to go swimming in a lough.
Present perfect tense.
The present perfect tense of "hid" is "have/has hidden."
The present perfect tense of "exist" is "has/have existed."
The present perfect tense of "was" is "have been".
present tense past tense future tense present perfect tense past perfect tense future perfect tense present progressive tense past progressive tense future progressive tense present perfect progressive tense past perfect progressive tense future perfect progressive tense
The present perfect tense of "are" is "have been."
The present perfect tense of leave is have/has left. The present perfect tense of eat is have/has eaten.
The present perfect tense of "clap" is "have clapped" or "has clapped."
"have tried" is the present perfect tense.
Present Tense, Paste Tense, Future Tense, Future Perfect Tense, Present Perfect Tense, Past Perfect Tense
The present perfect tense of "explore" is "have explored."