几个句子的发音困难!我在练口语,模仿磁带时就是听不出that怎么读,例如,Itwasgenerallysupposedthatitwouldnothappenagain.Itisexpectedthattheweatherwillbegoodsoon.还有,Wecouldn'taffordtokeepourcar,sowe

　　几个句子的发音困难!

　　我在练口语,模仿磁带时就是听不出that怎么读,例如,Itwasgenerallysupposedthatitwouldnothappenagain.Itisexpectedthattheweatherwillbegoodsoon.

　　还有,Wecouldn'taffordtokeepourcar,sowesoldit.和Icouldn'tagreewithyoumore.中的couldn't怎么读.

　　of在句子中读的快时不象连读的,到底怎样发好呢.