PAST PERFECT
100

What is  the afirmative, and negative form the past perfect?

Afirmative: Subjet +had+verb past participle+object

Negative: Subjet+had not+ verb past participle + object

200

When do you use  the past  perfect ? 

The past perfect describes an action that took place in the  past before another past action. 

300

The verb auxiliary en the past perfect is "HAVE AND HAS"

No,  its "HAD"

400

Is it the  example  correct o wrong?, If it´s wrong say the form correct.

He had play the guitar before the concer

It´s  wrong

The correct is:

He had played the guitar before the concer.

500

Is it the  example  correct o wrong?, If it´s wrong say the form correct.

She had finished her homework before dinner

it´s correct