1、语法及练be动词Be动词的用法规律:I用am,you用are,is连着它,他,她。单数名词用is,复数全用are,are,are。练习:用恰当的be动词填空。1.I______aboy. ______youaboy? No,I_____not.2.Thegirl______Jack'ssister.3.Thedog_______tallandfat.4.Themanwithbigeyes_______ateacher.5.______yourbrotherintheclassroom?6.Where_____yourmother? She