PAST PERFECT SIMPLE
FORM
INTERROGATIVE: Had+subject+past participle
NEGATIVE: Subject+had/hadn't+past participle
POSITIVE: Subject+had+past participle
USE
The past perfect is used in the part of the sentence that explains the condition (the if-clause). Most often, the reason to write a verb in the past perfect tense is to show that it happened before other actions in the same sentence that are described by verbs in the simple past tense.
EXAMPLES
Had you bought that t-shirt?
Had you eaten frog legs before
I hadn't had dinner yet.
I hadn't been to Australia
I had eaten lamb before I went to the cinema
I had argued with my friend before I came here
DIFFERENCES BETWEEN PAST PERFECT SIMPLE AND PAST SIMPLE
These two tenses are both used to talk about things that happened in the past. However we use past perfect to talk about something that happened before another action in the past, which is usually expressed by the past simple.
LINKS
IMAGES
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjcisr1g-XlAhXHxoUKHferB_wQjRx6BAgBEAQ&url=https%3A%2F%2Fletslearnenglisheasy.weebly.com%2Fpast-perfect.html&psig=AOvVaw15kwR0eTny4jWC_hWYf2cZ&ust=1573660234204126
VIDEOS
https://www.youtube.com/watch?v=jwmKp93KrqI
https://www.youtube.com/watch?v=EXZhC1isONI
https://www.youtube.com/watch?v=X-pLTIafYWM
https://www.youtube.com/watch?v=A3HRUtZCAa4
ACTIVITIES
PAST PERFECT SIMPLE AND PAST SIMPLE
https://english.lingolia.com/es/gramatica/tiempos-comparacion/simple-past-past-perfect/ejercicios
https://www.superprof.es/apuntes/idiomas/ingles/gramatica-inglesa/verb-tense/exercises-simple-past-and-past-perfect-ii.html
ONLY PAST PERFECT
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwjq9cLBg-XlAhVrxoUKHfm-AA8QjRx6BAgBEAQ&url=https%3A%2F%2Fwww.tes.com%2Flessons%2FX62jIbgLKtQw4A%2Fpast-perfect-past-simple&psig=AOvVaw15kwR0eTny4jWC_hWYf2cZ&ust=1573660234204126
https://www.superprof.es/apuntes/idiomas/ingles/gramatica-inglesa/verb-tense/exercises-past-perfect-simple-i.html
https://english.lingolia.com/es/gramatica/tiempos-verbales/past-perfect-simple/ejercicios
