1. They must have been drunk
2. They had to have been drunk.
What is the difference in meaing between the two?
I have read this book.
I had read this book. <--is this incorrect? why?
if so, is this correct then?
I had read this book before? <--correct? why?
or should it be
I have had read this book before? <--correct? why?
2. They had to have been drunk.
What is the difference in meaing between the two?
I have read this book.
I had read this book. <--is this incorrect? why?
if so, is this correct then?
I had read this book before? <--correct? why?
or should it be
I have had read this book before? <--correct? why?