present simple:I build the house.

pr.continues:I am building the house

pr.perfect:I have already built the house

pr.perfect continues:I have been building house for 2 hours

PAST SIMPLE:I built the house.

past.continues:I was building the house at 3 o'clock

past perfect:I had built the house by 7 o*clock yesterday

past perfect continues :I had been building the house

I read books every day. (Present Simple). I read a book yesterday. (Past Simple). I'll read a book tomorrow (Future Simple). I'm reading a book now (Present Continuous). I was reading a book at 3 o'clock yesterday (Past Continuous). I'll be reading a book at 3 o'clock tomorrow (Future Continuous). I have read this book already (Present Perfect). I had read a book by 3 o'clock yesterday (Past Perfect). I will have read this book by 5 o'clock tomorrow (Future Perfect). I have been reading a book for 3 hours (Present Perfect Continuous). I had been reading a book for three hours when mother came (Past Perfect Continuous). When mother comes, I'll have been reading a book for three hours (Future Perfect Continuous)