Full description about past perfect tense with examples

1. Past Perfect Tense
This tense usually expresses an
Action which has occurred in
The past (usually a long time
ago) before another action
In the past.
This tense represents
Past in past.
Eg- The film had started
before we reached cinema

2. How can we make past perfect tense
For positive sentence :
subject + auxiliary verb + main verb(V3)
:
For negative sentence
subject + auxiliary verb +not+ main verb(V3)
For question sentence
auxiliary verb + subject+ main verb(V3)

3. subject Auxiliary
verb
Main
verb
+ I Had Finished My work
+ You Had stopped Before
me
- She Had Not Gone To
school
- We Had Not Left
? Had You Arrived?
? Had They Eaten Dinner?

4. Example:
He had been studying in
the school since 2005.
If there is no sense of
time reference ,then it is
not past perfect continuous
tense.
It is used to express an
ongoing action that
started
In the past and
continues
Until sometimes in past

5. How to make past perfect continuous tense
subject + auxiliary verb WILL + auxiliary verb
HAVE + auxiliary verb BE + main verb (base + ing)
 For negative sentences in the past perfect
continuous tense, we insert not after the first
auxiliary verb.
 For question sentences, we exchange the subject
and first auxiliary verb. Look at these example
sentences with the past perfect continuous tense

6. sub Auxiliary
verb
Auxiliary
verb
Main verb
+ i Had been Working
+ You Had been Playing tennis
- It Had Not been Working well
- We Had Not been expecting Her
? Had You been Drinking?
? Had They been Waiting Long?