The past perfect tense of enter is had entered.
The past perfect tense is 'I had written'.The present perfect tense is 'I/you/we/they have written. He/she/it has written.
"Had written" is the past perfect tense of "write".
Wrote is the simple past; had written is the past perfect.
The present perfect tense is:I/You/We/They have written.He/She/It has written.The past perfect tense is:Had written.The future perfect tense is:Will have written.
Yes, it is a verb. It is the past tense of "to have" and used as an auxiliary verb in the past perfect tense.
The past tense of "exist" is "existed." The past perfect tense is "had existed."
The past perfect tense of hope is had hoped.
The past tense of "bleed" is "bled." The past perfect tense of "bleed" is "had bled."
The past tense of sit is sat. The past perfect tense of sit is had sat.
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 past perfect tense of 'get' is 'had gotten'
Perfected is the past tense of perfect.
"Had been" is the past perfect tense of be.
The past perfect tense of "do" is "had done." For example, "She had done her homework before dinner."
The past perfect tense of borrow is "had borrowed."
The past perfect tense of "think" is "had thought."
The past tense of paint is painted. Had painted is the past perfect tense.