Could you speak at a natural speed, please? And can you correct the sentences if there is mistakes or if you would say it differently? Thanks!
If he were here he would be cleaning
I could be reading in the garden if it didn’t rain
He wouldn’t be living here without his parents’ help
Shouldn’t we be studying?
Would I have passed the exam if I had studied just one extra night?
It’d have been nice if he had phoned you
'Phoned' is a bit archaic and rarely used. While technically correct, you would typically use 'call' or 'called'.