file:4.谓语动词（4）.flv file:9.时间状语（现在完成时）.flv file:8.祈使句+and+一般将来时.flv file:7.主祈从现.flv file:16.过去将来时.flv file:15.bythetime+从句(将来完成时.flv file:4.多音节的形容词、副词.flv file:1.混合词序的问题.flv file:8.总分结构对照.flv