milked pulled（不同） picked cooked的音标为什么不同?

milked pulled（不同） picked cooked的音标为什么不同? pulled milked watched cooked 读音不同 cooked milked washed 找读音不同 pulled pulled pulled 根据动词过去式的词尾归类 picked,watered,tasted,cooked,listened,cleanned,planted,collected,watched,played,milked,pulled,studied/t/____________/d/__________________/id/_____________________ pulled pulled away,pulled down,pulled off,pulled up pi pi asked caller cleaned danced helped liked looked milked planted visited opened picked collected pulled watered watered watched played remembered stayed studied touched washed 这些词中那些词的ed发音/t/,那些词的ed发音/d/,那些词的ed We pulled the carrots last week.(改一般疑问句） We pulled the carrots last week.(改否定句） We saw the houses in the street（ ）in order to make room for a large square.A.pulled off B.pulled up C.pulled down D.pulled in请从句子成分,语法结构,时态等详细的分析. pulled是什么意思 to have been pulled down,不定式的被动完成时态和having been pulled down动名词的被动完成时态,他们有什么不同啊?求讲解 化简间sin（a-2pi)cos(a+pi）tan(a-99pi)cos(pi-a)sin(3pi-a)sin（-a-pi） milked watched watered cooked 找不同音